Ask the Expert

Should large invasive trees be removed and replaced with native species?

Question: I’ve been slowly working over the last few years to remove a rather large amount of invasive plant species dotting my property and replacing them with alternative species. I’ve got several different kinds, but the three most pervasive are Asian Bush Honeysuckle, Norway Maples, and Multiflora Rose. They’ve taken over everything, and have all […]

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When is the correct time to prune rhododendrons?

Question: I have a large healthy and very overgrown rhododendron in front of the house. I will be pruning about 1/3 of the plant.  I am seeing some sites that advise pruning in late winter when the plant is dormant and other sites that advise pruning right after blooming in the spring. What do you […]

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What are recommendations for using arborist chips in a vegetable garden?

Question: Please provide recommendations for using arborist chips in a vegetable garden for plants and seeds. Answer: Abi Griffith, Horticulture Community Education Assistant Wood chips are really great for mulching in perennial beds, around raspberries or high bush blueberries, on permanent walkways or between raised beds to help with weed suppression and water retention. They […]

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What is the black substance on Maple trees?

Question: I have many maple trees with various amounts of a black substance on their trunks. I am assuming it is a fungus, but am not sure. On trees with just a little, it appears circular and is located near the base of the tree. On trees with a lot of fungus, it almost fully […]

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Is it legal to transplant peonies from Maryland to Maine?

Question: Is it legal to transplant peonies from Maryland to property that I am purchasing in Maine?  I don’t want to leave behind my heirloom peonies, but I don’t want to cause environmental harm or break any laws. Answer: Lynne M. Holland, Horticulture and Social Media Professional First of all welcome to Maine!  I think […]

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What can you plant on top of and around the septic system?

Question: This fall we had to replace our septic system. We’re left with a dramatically different backyard and a gardening challenge. What can I plant on top of and around this system? The sun exposure is at times in direct sun for several hours. Answer: Lynne M. Holland, Horticulture and Social Media Professional What can […]

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What to do about black areas on peonies?

Question: In September 2021, I transplanted peony plants to a bed on the west side of our new home. They all came up, a couple even had flowers, but as time went on black areas (not spots) were seen on many of the plants. Unfortunately, I did not take a picture. I cut them down […]

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