Ask the Expert

Can you successfully plant a Redbud tree in the fall?

Question: I’d like to put in a Redbud tree. The tree in question is now in a large pot, but the branches are devoid of leaves. I’ve always understood autumn is a great time to plant perennial shrubs and small trees. So… is it too late to plant this tree – there is a week […]

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Why is the trunk on my Kousa Dogwood peeling and turning yellow?

Question: Kousa dogwood trunk has peeling yellow spots and bark. I read that this can happen when temps drop. Should I be concerned about anything else possibly causing this?  Answer: Jonathan Foster, Home Horticulture Outreach Professional Kousa dogwood (Cornus kousa) tends to develop this peeling, patchwork pattern to the bark as it matures–in fact, many […]

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What is the best way to plant native plants on a rocky shoreline?

Question:  I have 1,000′ of rocky shore and would like to plant flowering, ground-cover seeds on the spots with soil. Native plants would be best. There are birches and spruce growing in spots. Answer: Lynne Holland, Horticulture Professional Planting 1000 ft of shoreline is no small project and native plants are the best way to […]

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How should I reseed the bare spots in my lawn?

Question: I have tried to reseed the bare spots in my lawn with little success. I looked online at winter seeding a lawn (Dec.-Feb.) and it shows a germination rate of up to 75% in the spring. Is this something that would work in our zone? If so, what seed mix/manufacturer would you recommend? Answer: […]

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What is causing black spots on my tomatoes?

Question: I grow Juliet tomatoes each year primarily for fresh eating and freezing for sauce. This year I planted late due to weather. Of interest, I use no chemicals/sprays etc, only addition is bone meal. My question is…what is causing black spots and are they safe to freeze/ process? Should I treat the soil in […]

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What information is helpful on greenhouse gardening in Maine?

Question: I am wondering if there is any information on greenhouse gardening in Maine specifically a planting schedule for later harvest. Answer: Jonathan Foster, Special Projects Assistant Greenhouse gardening in Maine is a broad topic, ranging from backyard cold frames to huge commercial operations. Because this is our home horticulture site, I’m assuming you are looking for information on […]

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How do you trim a hedge row of arborvitae?

Question: I was wondering if you can tell me when and how to trim my hedge row of arborvitae?  I need to cut off about six to eight feet off the height of this hedge row. Answer: Jonathan Foster, Special Projects Assistant Arborvitae can be topped, but you do run the risk of leaving some […]

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What plants should I use to replace Rosa Rugosas in my landscape?

Question: The former owners of our home had planted many Rosa rugosa plants, which faces southeast and gets plenty of sun. I’d like to replace these with more interesting plants and would love your suggestions. Maybe SHORT height hydrangea, some evergreens, peonies? I’d like it to be attractive through all seasons, and low maintenance. Answer: […]

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