Ask the Expert

Do ultrasonic deer repellants work?

Question: Do ultrasonic deer repellants work? We have a string of arborvitaes which the deer love to munch on in the wintertime. Is fencing the only other alternative? We have tried sprays and clip on deterrents but nothing like that works. Answer: Jonathan Foster, Special Projects Assistant The short answer, in my experience, is that […]

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What are recommendations for low maintenance, ecologically sound replacements for lawns?

Question: What does recent research recommend as alternative, low-maintenance, ecologically sound replacements for lawns. Is there recommended ground covers for shady areas or extra dry areas that can be planted to reduce lawn area? Answer: Jonathan Foster, Special Projects Assistant Some common groundcover alternatives to turfgrass include creeping thyme (Thymus serpyllum), creeping juniper (Juniperus horizontalis), creeping phlox (Phlox […]

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Why do some of the melons I grew have a bitter taste?

Question: I have had a bumper crop of sweet and delicious muskmelons and charantais melons this summer, but I am noticing that some of the later ripening melons have some parts of the flesh that have a bitter taste. This is the first year I have encountered this. There isn’t anything in the look of […]

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Can I plant Forget-Me-Not seeds now for next year’s blooms?

Question: Can I plant Forget-Me-Not seeds now for next year’s blooms? Will they survive the winter?  Answer: Jonathan Foster, Special Projects Assistant Forget-me-not (Myosotis sylvatica) is technically a winter hardy biennial, but is often grown as an annual. However, because it is such a prodigious self-sower, once planted it often continues on in successive generations […]

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What is causing the leaves to drop off my crabapple tree this summer?

Question: I have a flowering crabapple tree that has been losing its leaves all summer. I am wondering if it has a disease that I need to treat? Answer: Jonathan Foster, Special Projects Assistant I believe what you’re looking at on your flowering crabapple is a disease called apple scab. You can read more about […]

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What little green worm is eating my kale?

Question: My kale is getting eaten by a little green worm and there appears to be eggs on the plant as well. Do you know what this is and what I can do about it? Answer: Jonathan Foster, Special Projects Assistant There are several types of caterpillars that prey on brassica/cole crops like kale, with […]

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Should I remove the limb of a cactus that has a brown spot?

Question: I have a Blue Myrtle Cactus that is overall doing well. It is an indoor cactus. Over the past 3-4 weeks it has developed a brown spot at the end of one of its limbs where there had been some new growth. All the other limbs look great. I do not believe it has […]

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What is causing my beet sprouts to disappear?

Question: I have planted beets multiple times this season, with very little success. What happens is this: I plant the seed (Detroit Red) and a week or so later the little sprouts poke through the soil. I keep them watered, but over the next week or two, almost all of them disappear. I have a […]

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What can be done to save large diseased Hemlock trees from pests?

Question: I have some large diseased hemlocks that I’m hoping can be saved. It was suggested that I contact you regarding the possibility of using beetles to try to combat the pests. Can you please provide guidance?  Answer: Jonathan Foster, Special Projects Assistant As you may have told, Hemlock woolly adelgid is a bit of a […]

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What concerns should I have about the wider ecosystem if I’m considering adding Mycorrhizae to the soil around my roses?

Question: What concerns should I have about the wider ecosystem if I’m considering adding Mycorrhizae to the soil around my roses? Answer: Jonathan Foster, Special Projects Assistant As you probably know, based on your question, mycorrhizae are soil-based fungal organisms that form symbiotic relationships with almost all terrestrial plant roots, exchanging their vastly greater surface area’s ability […]

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