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Cherry tree dropping leaves
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Date Posted: Tue, Aug 11 - 11:37 am
- Need assistance with a cherry tree losing leaves. He did not see black spots or holes in leaves, thinks heat may be a factor.
- Thank you for contacting the Master Gardener Help Desk. Heat and drought stress can certainly cause cherry trees to lose leaves, particularly during the hot, dry conditions we've experienced this summer. When trees become stressed, they may shed older leaves to conserve water. However, leaf drop can also be caused by diseases such as cherry leaf spot, bacterial leaf spot, or other environmental stresses. Since you did not observe black spots or holes in the leaves, those diseases may be less likely, but it can be difficult to determine the cause without examining the tree and the fallen leaves. In the meantime, make sure the tree receives adequate water during dry periods. A mature tree generally benefits from a slow, deep watering when rainfall is lacking rather than frequent shallow watering. Applying a 2- to 3-inch layer of mulch around the base of the tree (keeping it several inches away from the trunk) can also help conserve soil moisture and moderate soil temperatures. If the tree is otherwise healthy and the leaf drop is due to heat stress, it should recover once environmental conditions improve. Avoid fertilizing or pruning the tree while it is under stress. If the problem continues, or if you notice spots on the leaves, dead branches, oozing bark, or other symptoms, it is likely more than an environmental problem. Photos of the entire tree, the trunk, and both the upper and lower surfaces of affected leaves would be especially helpful in narrowing down the cause. You can email photos to rvamastergardeners@gmail.com
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Ground Bees
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Date Posted: Tue, Aug 11 - 11:24 am
- Our lawn is infested with "ground bees." They emerge in the spring for about two weeks. They do not sting, but they are an annoyance. And they are destructive of our lawn. How can we get rid of them? Are there effective insecticides? Any help will be appreciated
- Thank you for reaching out with your question. Ground bees are solitary, ground-nesting native bees that are among the first pollinators to emerge in spring. Although they often nest in large groups, each female creates and provisions her own nest. They are generally non-aggressive and rarely sting as you mentioned, and their activity typically lasts only a few weeks before the adults disappear for the remainder of the year. During the rest of the year, the developing bees remain underground until the following spring. Because they are important pollinators, Virginia Cooperative Extension recommends leaving them undisturbed whenever possible. Ground bees prefer dry, well-drained soil. If they are nesting in an area where their presence is problematic, keeping the soil moist during their brief spring nesting period can discourage them from using that location in future years. Improving turf density through proper fertilization, overseeding, and irrigation can also make lawns less attractive for nesting by reducing areas of exposed soil. Virginia Cooperative Extension does not generally recommend insecticides for ground bees because of their beneficial role as pollinators and because their active period is so short. By the time treatment is considered, they are often nearly finished nesting for the season. If the bees are creating a safety concern in a high-traffic area, you may wish to consult a licensed pest management professional, but for most situations, tolerating them for the brief period they are active is the preferred management approach. Here are two online articles that discuss ground bees that you may find helpful: https://fairfaxgardening.org/ground-nesting-bees/ https://www.richmonder.org/ground-nesting-bees-are-a-spring-phenomenon-in-richmond/
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"Suckering" trees
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Date Posted: Wed, Jun 10 - 1:26 am
- Hi - we have a couple of trees that look to have “suckers” of varying lengths (an example shown below). Would an arborist be able to assist with removing these growths safely and helping to minimize future growths?
- Thank you for reaching out to the Richmond Master Gardeners, and for including a very helpful photo! The growth you’re seeing are called “suckers” or epicormic shoots. In your case, these are vigorous shoots coming from the lower trunk. While the leaf shape looks consistent with the rest of the tree, the green color (compared to the purple canopy above) suggests this growth may be coming from the rootstock rather than the grafted top. You are correct to want to remove these, as they can take energy away from the upper canopy and, over time, may outcompete the desired growth if left unmanaged. If you are comfortable with pruning, many homeowners find they can remove these themselves keeping a few things in mind. First, be sure to prune each shoot back as close to the trunk as possible (don’t leave stubs). Stubs will create more suckers. Always use clean, sharp pruners. It is best to remove the suckers while they are still relatively longer. For larger or very dense growth like you have, an arborist can certainly help, but it’s not strictly necessary if you’re comfortable pruning. To help reduce future suckering: 1. Continue removing shoots promptly when they appear 2. Avoid heavy pruning of the upper canopy, which can stimulate more growth 3. Keep the tree healthy with proper watering and mulch (but avoid piling mulch against the trunk) From what I can tell from your photo, this appears to be a purple-leaf redbud, which is often grafted onto a standard green-leaf redbud rootstock. The rootstock naturally produces green leaves and tends to grow more vigorously, which seems to be what you’re seeing here. More broadly, trees often produce suckers in response to stress or disruption. Common triggers include heavy pruning or canopy loss, damage to roots or trunk (from lawn equipment, construction, etc.), environmental stress, such as drought or poor soil conditions, planting issues (like being planted too deeply or having mulch piled against the trunk), and natural growth habit of certain species or rootstocks If these shoots continue to return aggressively, it may just be the nature of the rootstock, but it can also be worth checking for any underlying stress factors.
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Figs, mint, strawberries and cilantro
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Date Posted: Wed, May 06 - 2:08 am
- Hello, I purchased a small fig tree in a plant sale. However, I read after purchase that they can be really aggressive here in VA and choke other plants/roots extend so far that they can damage walls and foundation. I wanted to check if I should put it in a container or plant it as planned in an area that gets east and south Sun. If planted in the ground, how far should it be from structures? Is there an extra way to control its root growth ( pruning in the winter for example )? The same question for strawberries and herbs like sweat mint and cilantro. I read that they could spread and take over the garden and that a flower bed won’t keep them contained. Would they be better planted in a raised garden bed?
- It sounds like you had a great day at the plant sale and have several great questions! Starting with figs ... This is a really great resource about growing figs put out by the Virginia Cooperative Extension office and I believe it answers all of your questions: https://www.pubs.ext.vt.edu/content/pubs_ext_vt_edu/en/SPES/spes-760.html If you are interested in doing a soil test before planting, there are typically soil tests available from the local libraries. Also, if you'd like to see some examples of mature figs, including one that was recently pruned, you can visit Humphrey Calder Community garden at the corner of Thompson and Patterson. The pruning was done by the city to ease maintenance around the tree and protect the fence. Strawberries and mint are both eager growers and like to spread and can be challenging to control when planted in the ground. Personally, I always plant mint in a large grow bag. It is very happy there, comes back year after year, and is well contained. Strawberries can also be grown in containers easily, or you could make a small raised bed for them. There is another example of this at Humphrey calder - you will find a bed near the center opening area that is mostly strawberries, but the gardener grows other things in the middle of the strawberries, like tomatoes. The Piedmont Master Gardeners have a great resource about growing strawberries: https://www.piedmontmastergardeners.org/article/strawberry-basics-for-the-home-garden/ Cilantro is not something I have ever had to worry about taking over. It is very temperature sensitive and bolts easily as the weather warms. The cilantro I've been growing this spring has already bolted (gone to flower and forming seeds). I would recommend finding a shady spot for your cilantro, and if planting in a pot helps you get it in a shady spot, then that work perfectly fine. This is a great resource for growing cilantro in Virginia: https://gardenclub.org/blog/cilantro-cool-season-culinary-herb Good luck with your new plants! Have fun!
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Odor from lawn
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Date Posted: Thu, Apr 16 - 10:50 am
- Hi, we live in a townhouse in the fan that has a small backyard. This year and last we have noticed a pungent (almost skunky) scent that has started around mid-March and is gone in the winter. We think the cause is one of the plants/weeds that make up our “lawn” because the timing is just around when we start to see green again. The scent transfers to our dog when she lays in the grass. Any idea what type of plant would have this kind of smell? Or if there is anything we could do about it? I’ve attached an image of a portion of our yard but have others if that would be helpful. Many thanks!
- Thanks so much for reaching out and for sharing the photo, that’s really helpful. Based on your description of the timing and smell, one common cause we often consider is wild garlic or wild onion (Allium species), which can produce a strong, sulfur-like or “skunky” odor when crushed. However, I’m not seeing clear signs of those plants in the image you provided (they typically have distinct upright, hollow, grass-like leaves). What I do see is a mix of very common early spring lawn weeds, such as chickweed and bittercress, growing in a thin, somewhat compacted lawn. While these plants don’t usually have a strong smell individually, when they grow densely together and are disturbed by foot traffic, mowing, or a dog laying in the grass, especially when there’s some moisture present, they can release a musty, sulfur-like odor that can come across as “skunky” and can easily transfer to your dog’s coat. One other (less common) contributing factor could be compacted or poorly drained soil creating brief anaerobic conditions, which can also produce a sulfur-like smell; this is more typical in areas that stay damp, but it could be playing a small role depending on drainage. Over time, improving lawn density (particularly with fall overseeding) and reducing compaction can help crowd out these weeds and minimize the issue. In the short term, hand-pulling where feasible and giving your dog a quick rinse or wipe-down after being outside can help manage the odor.
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VCU Garden Beds
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Date Posted: Mon, Mar 30 - 2:36 pm
- I am trying to revive 8 garden beds in the courtyard of my campus dorm. The soil is currently dense w/ roots from the nearby mature trees, which have basically invaded the beds! I am unsure what we should do with the roots :( Do we cut them? Additionally, there is a little sapling that is groing magestically in the center of one of the beds.... I do not want to kill it, as it proves itself to be resilient. I am unsure what kind of tree it is, but I assume it grew form one of the seeds of the trees above. How can I excave and transport the sapling to someone/somewhere it can thrive? I do not have photos on this device, but I would love to share pictures in an email thread once you get back to me :) With much thanks in advance, Emma Toggia
- Thanks so much for reaching out to the Richmond Master Gardeners. What a wonderful project for your campus space! It sounds like you’re already putting a lot of care into bringing those beds back to life! What you’re seeing with the roots is very common when garden beds are located near mature trees. Those trees naturally extend their root systems into nearby soil to access water and nutrients. Regarding the roots, you can cut smaller invading roots (pencil-size or smaller) when preparing the beds but you should avoid cutting large structural roots, as this can stress or damage the tree. And unfortunately, even with cutting, roots will likely return over time, so it may help to add a layer of fresh compost and topsoil to improve growing conditions. When deciding what to plant here, we'd recommend choosing shade-tolerant, root-competitive plants like ferns and hellebores About the sapling: It’s great that you’d like to preserve it! You can attempt to transplant it, especially if it’s still relatively young. The best time to transplant is early spring or fall, but you can try now if you’re careful and keep it well-watered afterward. Dig a wide circle around the sapling to capture as much of the root system as possible (roots are often wider than you expect) Gently lift it, keeping as much soil around the roots as you can. There are some trees that have a very long tap root that can be nearly impossible to get out once they reach even a small size. If you find this to be the case with this tree, it may not be possible to save the tree and move it. However, if you are able to get the root ball out of the ground relatively intact, replant it promptly in a new location (or container), water deeply, and keep it consistently moist while it establishes. Do keep in mind that volunteer saplings often come from nearby trees and may grow quite large—so choosing an appropriate long-term location is important. If you have additional questions or want to share photos, you can reach us at rvamastergardeners@gmail.com. Best of luck with your garden beds, this sounds like such a meaningful project for your community!
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Tulips
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Date Posted: Mon, Mar 30 - 2:28 pm
- I know tulips are difficult but what kinds are most likely to be perennial in Richmond? I read species, emperor and Darwin? Is that right? What about Darwin hybrid? Tks!
- Thanks so much for reaching out to the Richmond Master Gardeners! There are so many beautiful tulips in bloom around the city right now. I can definitely relate to wanting to plant some of your own! You’re on the right track with your research. In general, species tulips are the most likely to behave as perennials in our Richmond climate. Among hybrids, Fosteriana (Emperor) tulips and Darwin Hybrid tulips tend to perform best, although Darwin hybrids typically return for a few years rather than long-term. Usually, bulb packaging will list the tulip type and blooming details, which can be helpful when selecting varieties. Also keep in mind that water and soil needs may vary depending on whether you’re planting in the ground or in containers (containers tend to dry out more quickly). For best results, be sure to deadhead spent blooms so the plant doesn’t put energy into seed production, and allow the foliage to yellow and die back naturally so the bulbs can store energy for future blooms.
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Arborvitae Decline
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Date Posted: Thu, Feb 26 - 12:58 pm
- We have 2 arborvitae bushes/trees in our front yard. in Goochland County. One has died; the other is dying. They are about 25 years old. Perhaps they have just lived out their lives; but if there is something else it might be helpful to know before we replace them. We are only planting native plants now, so that might help the situation. If you have any thoughts, I would love it. Thanks so much in advance for all that you do for our community.
- Thank you so much for reaching out — and for your commitment to planting natives! That makes such a positive difference for our local ecosystem. Arborvitae can live quite a long time, often 40–150 years depending on the species and growing conditions, so 25 years would not typically be considered old age. When we see one arborvitae turn completely brown and another beginning to decline, it usually points to an environmental or site-related issue rather than natural lifespan. Is this a change that you have just been seeing recently? My first thought goes to the winter weather that we have had - both with all of the ice that we had sticking around forever in January and more recently all of the rain saturating our soils. Arborvitae do not tolerate prolonged saturated soils very well. When soils stay waterlogged, roots are deprived of oxygen and can begin to decline or develop root rot. The extended ice cover would have kept soils cold and saturated longer, further stressing the root system and delaying recovery. Evergreen foliage continues to lose moisture in winter, so if roots are compromised, browning can occur fairly quickly. It's typically not one single environmental factor that can lead to decline but several factors in combination: Wet soil weakens roots, ice delays recovery, a sudden warm spell increases transpiration, the plant cannot move water efficiently. That combination can lead to rapid browning. Spider Mites are also a possibility for the damage but seem much less likely to me. When spider mites are present, the foliage typically turns brown or dusty prior to becoming completely brown and you tend to see gradual thinning, rather than sudden death. It's also a little early to be seeing spider mites, but you could try shaking a branch over a piece of white paper to see if you see anything mite-like coming off. Given the wet winter and prolonged ice we've experienced, root stress from saturated soils is the most likely cause of the decline, particularly if one plant has browned uniformly and rapidly without visible insect evidence. While spider mites (and bagworms) can affect arborvitae, their damage patterns and seasonal timing do not match up with your description. Unfortunately, the one arborvitae that is completely brown is unlikely to recover, as they do not regenerate from old wood. The second tree may continue to decline if root damage has occurred. If you are looking for native replacement options, a couple of suggestions to consider are Eastern Red Cedar (Juniperus virginiana) and American Holly (Ilex opaca). Good luck! The arborvitae beautifully framed your porch and I know it must be disappointing to lose them!
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Planting under a Magnolia
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Date Posted: Wed, Jan 14 - 1:33 am
- I have a magnolia tree in the front yard and underneath it it's mostly dirt. I don't really want to plant grass there but I wondered if you might suggest something that I could plant under the tree so it's not so muddy. My grandchildren get very muddy after a rain. I took a picture so you can kind of see what it looks like. It has a little bit of morning Sun but mostly shady during the day. Thanks for your help. I
- Thanks for reaching out to the Richmond Master Gardeners with this question! This is a very common situation under magnolias, so you’re not alone—and you’re smart to avoid trying to force grass there. Magnolia trees have shallow, wide-spreading roots and create dense shade, which makes it hard for turfgrass to survive. We are always gravitating towards native options anyways. A favorite of mine for a situation like this is a sedge. Pennsylvania sedge (Carex pensylvanica) is one of the BEST grass-like alternatives for shade. It looks neat, stays low, and is much tougher than turfgrass. (https://vaplantatlas.org/index.php?do=plant&plant=1242&search=Search) Some other native ground cover options you could consider are: Green-and-gold (Chrysogonum virginianum) Semi-evergreen, spreads slowly, cheerful yellow flowers in spring https://vaplantatlas.org/index.php?do=plant&plant=1776&search=Search Wild ginger (Asarum canadense) Excellent for shade, soft leaves, great soil cover https://vaplantatlas.org/index.php?do=plant&plant=2009&search=Search https://vnps.org/wildflowers-of-the-year-2/2010-wild-ginger-asarum-canadense/ Creeping phlox (Phlox stolonifera) Handles partial shade, beautiful spring blooms https://vaplantatlas.org/index.php?do=plant&plant=3156 A couple important things to keep in mind before planting anything under a magnolia: Avoid digging deeply (to protect roots) and do not pile soil or mulch against the trunk. You could consider covering some of the space with mulch - just be sure not to pile it against the trunk! Good luck!!
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Improving Yard conditions
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Date Posted: Mon, Jan 05 - 11:02 am
- How to thicken and greening a big yard with out reconstruction
- I apologize for the slow response to your question. I somehow did not receive the alert and just noticed the question when I was alerted to another question coming through. This is a question that needs more details for a specific response, however thickening and greening a large yard without major reconstruction is very possible, but the best approach depends on both site conditions and the end goal for the space. Before making changes, it helps to clarify whether the goal is a traditional turf lawn, a lower-maintenance landscape using native plants, or a mix of both. In general, improvements without reconstruction focus on soil health, plant selection, and management practices. Start with soil health (no digging required): Core aeration if the soil is compacted Top-dressing with compost to increase organic matter Soil testing to identify nutrient deficiencies or pH issues before fertilizing Next, match plants to both the site and the goal. If the goal is turf: Overseed with grass varieties suited to sun/shade, traffic, and moisture conditions. In Virginia, this often means tall fescue blends, fine fescues for shade, or warm-season grasses depending on location. If the goal is reduced turf: Transition difficult areas (deep shade, poor drainage, slopes, heavy traffic) to native groundcovers or mixed plantings. This can improve appearance and resilience without regrading or major removal And finally, adjust maintenance practices: Mow higher (3–4 inches for most cool-season grasses) Water deeply but infrequently Avoid over-fertilizing, which can lead to shallow roots and thinning turf Some information that would be needed to help give more specific recommendations would include sun exposure (full sun, part shade, deep shade), existing vegetation (grass type if known), size of the yard and problem areas, ultimate goal for the space (turf lawn, natives, or a combination), any recent soil test results. Feel free to follow up with us at rvamastergardeners@gmail.com. We also have some volunteers available for home consults and an in person conversation may be a great way to move forward! Thanks for reaching out to us and my apologies again for the delayed response!