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Why is my swamp milkweed dying?
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Date Posted: Thu, Aug 14 - 11:54 pm
- I have an established butterfly bush and swamp milkweed plant in my yard. They’re both around 3ft tall. This year, both plants began dying fast. We haven’t dumped anything there, nothing changed as far as plants, soil, drainage, etc. with one exception. Three years ago we planted some Blue Mistflower. It never came up until this year. It is climbing the dead butterfly bush. I’ve read Blue Mistflower spreads via rhizomes and that this could potentially be the cause. Any thoughts? Other things I should check? Thanks!
- Thanks for reaching out to the Richmond Master Gardeners! I've connected with one of our gardeners, Pam, that has a wealth of knowledge on native plants to help give you some guidance. There has been a lot of chatter in the Virginia Native Plant Society Facebook group that this has been a banner year for milkweed aphids. Swamp milkweed seems particularly susceptible to this aphid, and you truly have “a” plant (singular), it becomes the sole target for the aphids. The aphids submit a dew that causes a fungus. Unfortunately, the picture doesn’t show the milkweed clearly enough for this to be more than a guess, but we think it’s a reasonable possibility. We wouldn’t blame the blue mist flower. Yes, it’s hardy and loves to spread, but it’s a valuable late-season food source for pollinators. We recommend planting a different companion for it. You did not mention you soil or light conditions, but the Plant RVA Natives guide (download free at vnps.org) will help identify companion plants that can hold their own with an enthusiastic spreader. Pycnanthemum muticum, clustered mountain mint, might be a possibility, and it blooms much earlier, spreading the glory. Since butterfly bush is designated invasive in Virginia, we can’t ethically recommend trying to save it or replacing it with another. But its loss provides an opportunity to plant more natives. If you have additional questions about natives, Pam will be at the West End Branch of the Richmond Public Library on Wednesday afternoons after Labor Day. You are welcome to stop in and chat with her more!
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Pests & Disease -- Rosemary
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Date Posted: Mon, Feb 21 - 7:57 pm
- I seem to have little brown nodules all over my Rosemary and it seems to be reducing its vigor and making the leaves look like they have aphids one them [the green is draining out of them]. Do you know what causes this? does it make the rosemary not good for eating? If I treat it, what would I use and how would it effect eating it? I coudl send a photo if that would help. Thank you. Lynn
- Hello there, Based on your description I think the problem is bacterial leaf spot. I can't say for certain though. I've attached a link from the Missouri Botanical Garden about bacterial leaf spots and blights. If you open the link and scroll down, you'll find 2 photos of rosemary side by side. The one on the right may depict the problem you are encountering. Be sure to read all 8 items about prevention and control. You'll read that there is not much to be done if the plant is too far gone. You can try cutting the stems that are affected but be certain to clean your tools as directed in the article. Depending on the severity it may be wise to properly dispose of the plant and replace it with a healthy new one while adhering to all the points made about prevention. I hope this helps solve your problem. Sometimes replacement is the best choice https://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/diseases/bacterial-spots.aspx
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Controlling Japanese Beetles
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Date Posted: Tue, Aug 17 - 8:50 pm
- How can I safely control Japanese beetles? They're devouring my roses. I don't want to use anything that would hurt bees or hummingbirds.
- Thank you for your question. I certainly understand the extent of damage Japanese beetles can cause to all parts of the Rose bush - buds, leaves, and flowers! A very safe, organic, and effective means to control Japanese beetles is a routine spray of a Neem oil solution. A Neem oil solution both kills and repels the beetles when applied every 7-10 days. This solution is totally organic and non-toxic to bees or birds. Simply mix 2 tablespoons of Neem oil per gallon of water, and spray all parts of the rose plant. A side benefit is that this Neem oil solution also controls aphids, lace bugs, mealybugs, and spider mites. Another solution is a simple soap and water solution (although not quite as effective at repelling the beetles as the Neem oil solution). Mix 4 tablespoons of dish soap with water in a spray bottle and spray all parts of the plant. Best of luck! Let us know if you have other questions!
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Aphids on Tomatoes
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Date Posted: Tue, Aug 17 - 8:43 pm
- Help! Aphids are attacking my tomato plants. What're some good ways of getting rid of aphids without damaging the tomato plant itself? Also, how important is it to get rid of aphids in the first place?
- I can certainly feel your pain regarding this issue! It’s a common problem this time of year. Fortunately, there is a very effective and relatively simple solution to rid your tomato plants of aphids. To answer your second question, it is in fact important to get rid of the aphids. They can put stress on your tomato plants which will negatively impact yield. Aphids suck sap from the leaves which results in leaves curling and turning yellow, and if left untreated can ultimately kill the plant. A very safe and organic treatment solution is a mix of 1-2 ounces of Neem Oil to a gallon of water. Apply this solution via spray bottle to your plants, and apply in the morning or early evening. It can be reapplied every 7-14 days if the problem persists. This solution is not harmful to other animals or birds. It sounds like you identified this problem early so your plants should be fine if you treat them soon. Best of luck!
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Insects eating basil leaves
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Date Posted: Fri, Aug 06 - 8:47 pm
- Something is eating my basil! Everything else (lettuce, kale, tomatoes, cilantro, arugula) is ok...any suggestions to protect the basil leaves?
- These are likely spider mites or aphids eating your basil leaves. There are two safe, organic solutions which are effective to rid these insects from your basil. The first is a homemade soap spray solution - add 2 teaspoons of mild liquid soap to a gallon of water and use a spray bottle to spray upper and under sides of the leaves. The second is a neem oil solution in a spray bottle - add 2 tablespoons of neem oil (can be purchased at most garden stores) to a gallon of water and spray upper and under sides of leaves. Neem oil will kill the insects and halt reproduction. You can reapply every 7 days. Both solutions described are harmless to humans, birds, or other animals. Good luck! If other questions, please let us know.
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Small white bugs on tomato leaves
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Date Posted: Fri, Aug 06 - 8:44 pm
- I have little white bugs on the leaves of my tomato plants, how can I remove them organically.
- Great question, and a common problem at this point of the growing season. It sounds like you have aphids on your tomato plant leaves, and a good, safe, and organic way to treat your plants is with a neem oil solution. Neem oil is plant based organic oil. Mix two teaspoons of the neem oil to a gallon of warm water, mix well, and spray your tomato plants. You can reapply every 7 days. Neem oil is not harmful to humans, birds, or other animals. In very dry weather, make sure your tomato plants are well watered before applying the neem oil solution. Feel free to reach out to us if other questions come up!