Invasives: What are they? What can you do about them?

See a culprit, dig it out

I’m lucky. Unlike many houses built in the 1800s or early 1900s, mine had no invasive plants when I bought it in 1970, probably because it was built as a creamery, or butter factory. Decorative plants were not needed. Most older houses are plagued with plants brought from Asia or Europe by well-meaning people who did not know that, once imported, those handsome plants might not have any predators that could keep them under control. Most of our native insects will not eat foreign plants.

Plants including Japanese knotweed, Asian bittersweet, goutweed, purple loosestrife, yellow pond iris and multiflora roses have thrived in New England, and all are nearly impossible to get rid of, once established. Unfortunately, I now have four of the six mentioned above. But no Japanese knotweed or bittersweet, thankfully (they are two of the worst).

Plants including Japanese knotweed, Asian bittersweet, goutweed, purple loosestrife, yellow pond iris and multiflora roses have thrived in New England, and all are nearly impossible to get rid of, once established. Unfortunately, I now have four of the six mentioned above. But no Japanese knotweed or bittersweet, thankfully (they are two of the worst).

Multiflora rose hips are eaten by birds, but the plants are invasive and should be removed. Photo by Henry Homeyer.

The multiflora rose was introduced from Asia in the 1860s as a vigorous ornamental rose and as a source of rootstock for grafted roses. In the 1930s it was widely introduced as erosion control and alongside highways — a mature planting is so dense it can prevent cars from going over median strips. But the birds liked the rose hips — the seed pods — and it escaped cultivation.

So what am I doing to eliminate it on my property? I am digging it out. Most effective for one- or two-year-old plants, I am using a curved, single-tine hand tool called the CobraHead (www.cobrahead.com) to carefully excavate the roots until I can lift the plant out.

First, I dress appropriately: jeans, long-sleeved shirt, a hat with a brim, and heavy winter leather work gloves. This culprit wants to hurt anyone trying to uproot it. I cut off the branches, just leaving a foot or so to grab onto when pulling it out. Then I loosen the soil and pull weeds around it. The roots radiate outward from the stem like spokes on a bike. I loosen each root and tug gently when they are small enough to remove.

First, I dress appropriately: jeans, long-sleeved shirt, a hat with a brim, and heavy winter leather work gloves. This culprit wants to hurt anyone trying to uproot it. I cut off the branches, just leaving a foot or so to grab onto when pulling it out. Then I loosen the soil and pull weeds around it. The roots radiate outward from the stem like spokes on a bike. I loosen each root and tug gently when they are small enough to remove.

I’ve read that just cutting back the stems to ground level will stimulate the roots to send up new shoots everywhere, causing a bigger problem. There is no easy answer. Invasive plants are always difficult to remove — usually a scrap of root can generate a new plant or several.

Buckthorn is another invasive that is common along streams and at the edges of fields. As with multiflora rose, cutting it down stimulates the roots to send up new shoots. The best way to eliminate it is to starve the roots: Take a pruning saw and cut through the bark and the green layer of cambium beneath that. Go all the way around the trunk, then repeat 6 inches above the first cut, and repeat. This will not kill the tree until the third year, but this slow death will not stimulate the roots to grow. Best done in winter or fall after leaf drop.

Since buckthorn is often multi-stemmed, it can be difficult to use that method. Do it up high enough that you can get your saw in between the stems. But I’ve done it, and it works.

Purple loosestrife is blooming now in swamps and wet places — it is gorgeous but outcompetes many of our native wetland plants that feed pollinators and other animals. Like many invasives, it produces huge numbers of seeds and these seeds don’t all germinate the next spring — many stay dormant for years. I’ve read that multiflora rose seeds can stay viable up to 20 years — a good reason to clear plants out when young.

My approach to purple loosestrife is to dig out new, young plants. I recognize them by their square stem, the leaf shape and the color of the stem, which is often reddish. But for big established plants I just use a curved harvest knife to slice off the foliage once or more than once each summer. This prevents seed production and reduces plant energy.

As regular readers of this column know, I only use organic techniques in the garden. This means no chemicals including herbicides. From what I have read, most herbicides will not kill the invasives mentioned in this article. They will set them back considerably, depending on the age of the plant and the dose of the chemical. But learning to recognize all the invasives is best. And if one appears on your landscape, get rid of it immediately! And remember, persistence is important.

Henry is a lifetime organic gardener living in Cornish, N.H. He presents at garden clubs and libraries around the region, and is the author of four gardening books. Reach him at [email protected].

Featured photo by Henry Homeyer.

Gardening better as we age

Make room for raised beds and homemade cookies

As a Certified Senior Citizen I sometimes wonder if I am too ambitious in my garden. I have about an acre of gardens with 200 or more kinds of flowers and a good-size vegetable garden. These gardens please me greatly, and I visit them daily all year, even in winter. In gardening season I spend considerable time weeding, pruning, mulching and admiring our gardens. I am blessed with a wife who loves to garden and even loves weeding and edging!

Still, I know that my body will not always be able to work as hard as I ask it to now. So what can we do as we get older to make our work easier? First, we can stop buying new plants and creating new garden beds when our current beds are full. That is a hard choice to make, but I do my best to follow that rule.
We can also diminish the size of our gardens. For years I have grown 35 to 50 tomato plants each year. But I will try to drop down to 25 next year, and fewer each year after that. I do love the tomatoes and freeze and dehydrate many each summer for year-round use. But we do have plenty of farm stands growing great veggies, and I could use them more.

Raised beds make gardening easier on us, too. I have one nice deep cedar gardening “trug” that is 6 feet by 2 1/2 feet in size and stands 30 inches tall. I got it from Gardener’s Supply several years ago and it has held up well. I grow mostly kitchen herbs in it, along with a little lettuce and a few hot peppers. It is just steps from the house, while the vegetable garden is downhill and a few hundred steps away. I might get another, or build one.

I recently visited my friend Fred Sullivan, a retired dairy farmer, who lives nearby. His wife of many decades, Shirley, passed away last year; she did most of the vegetable gardening but Fred has taken it on. Some years ago he made Shirley four nice raised beds using landscape timbers. Each is 4 feet by 8 feet and about 20 inches tall. He grows tomatoes, cucumbers, summer squash and some Swiss chard.

I asked Fred about his gardening efforts. He told me that the doctor said he needed to stay active if he wanted to stay healthy. Gardening is a good form of gentle exercise for someone in their 80s, and you get “free” food, too! His best advice: “Be good to your soil, and it will be good to you.”

The raised beds make it easier to work. If you want raised beds, many companies are producing easy-to-assemble beds that are reasonably priced. Although most require quite a bit of soil mix, you can reuse the soil from year to year. I add fresh compost and some slow-release fertilizer each spring to my raised beds.

I recently called my friend Sydney Eddison at her home in Connecticut to talk about gardening as we get older. She is the author of many gardening books and a few nice small books of poetry in recent years. Her book Gardening for a Lifetime: How to Garden Wiser as You Grow Older (Timber Press, 2010) is full of good ideas.

Sydney told me, “Cultivate imperfection.” She said that as we get older we have to accept that our gardens can never be perfect. But she emphasized choosing plants that are reliable under any conditions, and that are low-maintenance plants. I agree.

Daylilies  are easy to grow and require little work. Photo by Henry Homeyer.
Daylilies are easy to grow and require little work. Photo by Henry Homeyer.

Delphinium and peonies, for example, are wonderful plants but most need to be staked and looked after to keep them from flopping or breaking in a heavy rain. I can’t imagine ever getting rid of my peonies, but maybe I don’t need quite so many — I could share a few with younger friends.


A plant that Sydney loves is a sedum called Autumn Joy. She has a dozen or so mature plants, each clump 30 inches wide, and they look good even in winter wearing what she calls “snowy hats.” Daylilies are also wonderful — and a mainstay in her garden. She pointed out that they can bloom for nearly two months if you pick early, mid-season and late-season varieties.

Shrubs are less work to maintain than perennials or annual flowers. Plant them, or have someone plant them, and they will require little — so long as they are not varieties that grow inordinately fast. There are plenty that can go several years without pruning.

One of my favorites is called fothergilla (Fothergilla major). It has nice white bottle-brush blossoms in May and spectacular fall foliage. Mine, after 20 years and very little pruning, is only 5 or 6 feet tall and wide. It’s hardy to Zone 4.
And of course, the easiest plant to grow is lawn grass. Once established it really only requires a weekly mowing. There are plenty of people who are willing to do the mowing for a reasonable fee — and there is little they can do to damage it.
Sydney Eddison gave me good advice: If someone offers to help in the garden, accept! And if no one does offer, try to hire a younger person to help. Offer to teach them about gardening. At the end of the day sit in the garden and drink tea and eat homemade cookies. Both of you will be happy.

Henry is a lifetime organic gardener living in Cornish, N.H. He presents at garden clubs and libraries around the region, and is the author of four gardening books. Reach him at [email protected].

Featured photo by Henry Homeyer.

Kiddie Pool 23/09/14

Family fun for the whenever

Season ender

The New Hampshire Fisher Cats play their final home games of the season with a series slated to start Tuesday, Sept. 12, against the Somerset Patriots. On Thursday, Sept. 14, game time is 6:35 p.m. and the evening’s theme is 2000s night, with post-game fireworks and a performance by Tyler’s Amazing Balancing Act. On Friday, Sept. 15, game time is 6:35 p.m. and the Fisher Cats become the Gatos Feroces de New Hampshire for a night. The game also begins at 6:35 p.m. on Saturday, Sept. 16, when the first 1,000 fans will get a bobblehead and there will be post-game fireworks. On Sunday, Sept. 17, the game starts at 1:35 p.m. and the theme is Fan Appreciation. See milb.com/new-hampshire for tickets and more information — and to get a peek at 2024. According to the schedule, the first home game of next season will be Tuesday, April 9, when the Fisher Cats will once again play the Patriots.

Special screenings

Chunky’s Cinema Pub (707 Huse Road, Manchester; 151 Coliseum Ave., Nashua; 150 Bridge St., Pelham, chunkys.com) has two special screenings planned for this Friday at all three theaters. A sensory-friendly presentation of Teenage Mutant Ninja Turtles: Mutant Mayhem (PG-13, 2023) will screen at all three theaters on Friday, Sept. 15, at 3 p.m. The sound will be down and the lights will be up. Also on Friday at 3:30 p.m. all three locations will present a “Little Lunch Date” screening of Horton Hears a Who (G, 2008); admission is free but reserve a seat with a $5 food voucher.
And save the date for some upcoming non-movie happenings at Chunky’s. On Friday, Sept. 22, at the Chunky’s in Manchester it’s family-friendly theater candy bingo at 6:15 p.m. Admission costs $10 (plus fees). On Sunday, Sept. 24, 6 p.m. at Chunky’s in Nashua it’s family-friendly Taylor Swift trivia night. Farm fun

DeMeritt Hill Farm (20 Orchard Way in Lee; demeritthillfarm.com, 868-2111) will hold a Family Weekend at the Farm on Saturday, Sept. 16, and Sunday, Sept. 17, from 10 a.m. to 4 p.m., featuring face painting, children’s games and photo opportunities with the tractors, according to the website.

For the little guys

The Children’s Museum of New Hampshire (6 Washington St. in Dover; childrens-museum.org, 742-2002) will hold Toddlerfest, its annual celebration of the littlest museum-goers featuring special activities and events, Tuesday, Sept. 19, through Saturday, Sept. 30, including a reading of Eric Carle’s A Very Hungry Caterpillar with a visit from the Caterpillar (Sept. 29 and Sept. 30), a celebration of the museum’s 40th birthday on Sept. 23 and a Frozen dance party on Sept. 22. The museum is open Wednesdays through Saturdays with play sessions from 9 a.m. to noon or 1 to 4 p.m. and Tuesdays and Sundays from 9 a.m. to noon. Admission costs $12.50 for everyone over 12 months; $10.50 for 65+.

Save the date

The Girl Scouts of the Green and White Mountains will hold Lead Like a Girl, a community walk and fundraiser, on Saturday, Sept. 23, from 9 a.m. to noon at Manchester High School West. The cost to register is $15 per person with a $50 family cap, according to a press release. The first 100 people to register get a free T-shirt; sign up at https://bit.ly/LeadLikeaGirl.

Performers and puppeteers bring to life the time of the dinosaurs in Erth’s Dinosaur Zoo on Saturday, Feb. 10, at 2 p.m. at the Capitol Center for the Arts Chubb Theatre (44 S. Main St. in Concord; ccanh.com) with tickets on sale now for $35.25 and $48.25. For an additional $28.75 you can also attend a VIP meet and greet.

Rockets & music

McAuliffe-Shepard Discovery Center holds annual AerospaceFest

By Jill Lessard
[email protected]

The McAuliffe-Shepard Discovery Center welcomes scientists, stargazers, explorers and learners of all ages to a celebration of the 120th anniversary of flight at AerospaceFest 2023 on Saturday, Sept. 16, from 10:30 a.m. to 4 p.m.
Admission to the Fest is free, as are tickets to a new planetarium show that will play at times throughout the day. Planetarium tickets will be given out at the Welcome Tent on a first-come first-served basis. Parking is also free. Cookout-style food, beverages and ice cream will be available from The Starlite Cafe.

For the first time ever, AerospaceFest will encompass both indoors and out, allowing guests to visit exhibit halls, the observatory and the new Science Playground while enjoying an impressive line-up of guest exhibitors, science-based activities and top-notch entertainment. The event will also feature the premiere of a brand new planetarium show, “3-2-1 Liftoff!,” as well as a couple of highly anticipated rocket launches.

Highlighting the occasion will be a keynote address by astronaut Jay Clark Buckey Jr., an American physician who orbited the Earth 256 times aboard a 1998 NASA Space Shuttle mission.

“We have worked with Dr. Buckey in one way or another since he went to space aboard NASA’s Neurolab Mission in 1998,” said Jeanne Gerulskis, executive director of the McAuliffe-Shepard Discovery Center. “He is a great partner and friend and a wonderful speaker. Since coming back to Earth after his mission, he has been fully engaged in exploring more about human physiology in space and the psychological effects of long-duration missions. His work is advancing human knowledge as we prepare to live and work on the moon and Mars, and we want to know more about it.” 

AerospaceFest 2023 marks the 32nd year the event has been presented.
“No pandemics, construction of the museum, festival name change or change from a state agency to an independent nonprofit museum has stopped the festival,” says Gerulskis. “It’s a fun day!”

Entertainment for the festival will be provided by Nazzy and Mr. Aaron.

“Their pure enthusiasm, dedication and talent makes their presence a real asset for us,” Gerulskis said about the entertainers. “Mr. Aaron plays space-themed music and children follow him around like the Pied Piper! It is a delight to see and hear. Nazzy helps let the public know what is happening at AerospaceFest, and brings his eclectic musical tastes to the event. Music, space, robots, food, fresh air, and fun — what’s not to like?”

Although Gerulski has attended two dozen of them since becoming head of McAuliffe-Shepard in 1998, the annual festival never gets old. What does she enjoy most?

“Seeing the excitement on children’s faces when they look through a telescope for the first time or see themselves in infrared. Seeing the joy and excitement from people of all ages when they meet an astronaut. Talking with the people — scientists, engineers, educators, hobbyists — who have come to spend their Saturday sharing the wonders of Earth and the universe with the festival-goers. People’s happiness, curiosity and enthusiasm — including the festival-goers, our staff, volunteers, partners, our speaker and presenters — is what makes the event special for me. I have never missed one; they are the high point of the year!”

What does Gerulskis hope guests will take away from the event? “Increased curiosity about space, flight, the natural world and the universe in which we live. Increased enthusiasm for learning more about all things STEM (science, technology, engineering and mathematics). Memories of a fun day spent together, exploring new ideas. A desire to become members of the McAuliffe-Shepard Discovery Center and come back over and over again to keep learning about our universe.”

AerospaceFest 2023
When: Saturday, Sept. 16, 10:30 a.m. to 4 p.m. (rain or shine)
Where: McAuliffe-Shepard Discovery Center, 2 Institute Drive, Concord
Admission: free
More info:  www.starhop.com

Cooking and gardening: a marriage made in heaven

Grow basil, eat pesto, let the kids help out

I love to cook, and I love to eat. I got started gardening in the vegetable garden more than 70 years ago, in part, because everyone I knew loved to eat homegrown vegetables — raw in the garden, fresh in the kitchen or cooked for dinner. I’d pull a carrot and rinse it off with a hose — or just wipe off the dirt on my shirt. My mother didn’t care if I ate some fresh (organic) soil with my carrot; she was just glad I liked carrots.

This is the season for pesto, a dish that is heavenly — and simple to make. It has just four basic ingredients: fresh basil, garlic, Romano or Parmesan cheese, olive oil and nuts (and salt and pepper to taste). I used to use pine nuts, but when their price went north of $20 a pound I switched to walnuts. They taste great, too.

We grow a lot of basil each year — 20 plants or more this year. You can grow it in big pots if you don’t have space for a vegetable garden. But this year, if you didn’t grow basil, visit your local farm stand and get a couple of big bunches. For my recipe you will need 2 cups of basil leaves packed down in a 2-cup measure.

If you grew your own basil, hopefully it has not started to bolt — get tall and flower. It will still be usable even if it has, but it is tastier before that happens. Throw away any flowers that have appeared — and snip off flowers on other plants that you are not harvesting today. Blossoming makes the basil a bit bitter.

Wash the basil, then spin dry in a salad spinner if you have one. Remove the leaves from the stems and then pat the leaves dry with a cloth towel. You need enough basil to fill a 2-cup measuring cup with leaves packed down firmly, which is a lot of leaves.

Place leaves in a food processor and add 1/3 to 1/2 cup of roasted walnuts or pine nuts and pulse a few times. I brown the raw nuts in a cast-iron fry pan at medium heat. They brown better if you lightly oil the pan. But be careful: They can easily be burned, so stay right there, stirring constantly until they just brown. I find roasting improves the flavor considerably.

Next, prepare the garlic. You can use a lot or a little, depending on your love of raw garlic. I crush three large or six small cloves of garlic in a garlic press, add to the blender and pulse. I grow my own garlic but you can buy it if you don’t. Har-neck garlic is more flavorful than soft-neck — ask for it at a farm stand, as grocery stores don’t tend to sell it.

Add 1/3 to 1/2 cup of olive oil slowly with the food processor running. Blend the ingredients until the leaves, nuts and garlic are totally blended. Finally add half a cup of grated Parmesan or Romano cheese and pulse until well mixed in. Taste immediately on a toasted baguette or an English muffin. This is heaven.
This has not been a stellar year for tomatoes. All the rain and the paucity of sun has caused many tomatoes to get overwhelmed by fungal diseases. Fortunately, one of my favorites has done well. It’s called Sun Gold. It’s a cherry tomato that is not only delicious but also relatively productive and disease-resistant. I grow a dozen plants each year and each plant gives me 100 tomatoes or more. They grow in clusters of 10 to 20, producing from early to late in the season.

I dehydrate most of my Sun Golds, but also love them fresh in salads, in sandwiches, or cut in half and mixed with pesto. When I put them in a food dryer, I cut them in half with the cut side up. They turn into little nuggets of summer I use all winter in soups and stews.

Pesto is also good with boiled homegrown potatoes. I serve it as a potato salad with fresh tomatoes and a little celery. Yes, after giving up on celery years ago, I grew it this year and it has done well with all the rain. Although in the past it was tough and stringy and attracted slugs, this year it has been a pleasure to grow. I don’t harvest it all at once, but go down to the garden and cut what I need for that day. The stems are much smaller than commercial celery, but I’m glad I grew it.

I think the world would be a better place if every child learned to garden and learned the joy of eating fresh vegetables. You can teach your kids or grandchildren to love gardening the way my family did: Welcome kids to the garden, offer them meaningful jobs that are easy and fun, and never leave them alone to pull weeds. Let little ones ride in a wheelbarrow on top of a pile of weeds you pulled.

One of my first jobs in the garden was to stir the “tea” my Grampy brewed in a wooden barrel full of rain water and hen manure. I stood on an apple crate and stirred it with a long stick. It was a messy job, and a bit stinky, but it seemed like real work to a 3-year-old. Eventually I was allowed to dip out the tea in a metal frozen orange juice can, and give each tomato plant one full can. I’ve been hooked on gardening ever since.

Gardening really should be for everyone, so get your little people to spend time with you in the garden, even if they only search for toads and bugs or push trucks around.


Henry is a lifetime organic gardener living in Cornish, N.H. He presents at garden clubs and libraries around the region, and is the author of four gardening books. Reach him at [email protected].

Featured photo by Henry Homeyer.

Kiddie Pool 23/09/07

Family fun for the whenever

Music on the farm

Mr. Aaron will perform on Sunday, Sept. 10, at 3 p.m. at the Educational Farm at Joppa Hill (174 Joppa Hill Road in Bedford; theeducationalfarm.org). Tickets cost $20 per family. The afternoon will also feature food trucks, vendors and face painting, according to the event’s Facebook post, where you can find a link to tickets.

Save the date for comics

The American Independence Museum (1 Governors Lane in Exeter; independencemuseum.org) will host a series of free Constitution Comics workshops on Saturday, Sept. 16. New Hampshire-based cartoonist Marek Bennett (marekbennett.com) will hold a workshop at 10 a.m. for educators about how to use comic-making in the classroom to explore primary sources, according to a press release. At 11:30 a.m. and 1:30 p.m., participants will practice what they learned by instructing families and kids on basic techniques of cartooning, the press release said. Preregister on the museum’s website; the events for kids and families have a suggested donation of $10, according to the website.

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