Master Gardener – Answers
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Discolored leaves - Mexican Petunia
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Date Posted: Tue, Aug 27 - 11:07 pm
- My dad has a lot of mexican petunia at our beach house in North Carolina. They have developed this odd discoloration on the leaves (see pic below). They reside in predominantly shade and have been there forever. Any idea what this could be and how to fix it? I have them here in Richmond but mine have not done that.
- First - please let me apologize for the delay in getting a response over to you! The website had some updates done that unintentionally prevented our access to answer questions! We finally have it fixed and are back up and running. We appreciate your patience! This seems most likely to be gall mites. Wet and humid conditions which are typically prevalent throughout the month of August will facilitate the growth of gall mites. Mexican Petunias tend to prefer full sun, so being in the shade has probably exacerbated the problem. From what we have read, a horticultural oil like All-Seasons Oil Spray will get rid of these mites, although they should be used with caution as they can cause phytotoxicity at high temperatures. If you are interested in reading more about gall mites here is an informative article: https://blogs.ifas.ufl.edu/monroeco/2022/08/30/what-is-this-gall-mites/ As Master Gardeners, we would also be remiss not to mention that concerns for mexican petunia to be invasive. It is currently classified as highly invasive in Florida and we imagine other states will start listing it as such as well. It spreads via both numerous seeds and lateral roots and therefor can be difficult to control and/or remove. It could be a good time to consider removing this plant and replacing it with native options. Here are a few ideas that you could think about if you are looking to keep some color in the area: East coast dune sunflower, Helianthus debilis subsp. debilis, blue porterweed, Stachytarpheta jamaicensis, tickseed, Coreopsis leavenworthii, tropical sage, Salvia coccinea, or firecracker plant, Russelia equisetiformis can be used.
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Flyers
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Date Posted: Sun, Aug 04 - 11:50 pm
- I saw flyers for Homegrown National Parks at your table at a Lewis Ginter Botanical Gardens plant sale. I am interested in getting some of the flyers if you have them available as well as your flyer National Night Out next week. I look forward to your response in my email. Thank you.
- Hello! Thank you for reaching out! While we definitely support both Homegrown National Parks and National Night out, the Richmond Master Gardeners did not have a booth at the Lewis Ginter Plant sale and we do not have either of those flyers. I'm not certain which of the local Master Gardener groups attended the sale, but I would suggest trying Henrico Master Gardeners next. Good luck!
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Transfering from out of state
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Date Posted: Tue, Jul 30 - 12:23 am
- Hello, I recently moved go Richmond and I am interested in transferring my Master Gardener certification here. I completed the MG training in Philadelphia and was certified in October 2023. I would love to be involved here and start volunteering. Is there a way for me to transfer my certification? Thanks so much!
- Hello! Welcome to Richmond! We hope you will enjoy it here. We would love to have you join the Richmond Master Gardeners. Richmond does not have an extension agent currently so we are trying to do our homework to figure out what is needed for your transfer. We believe that you will need to take a few additional classes related to this area specifically. The Richmond office is not offering classes at this time. It may be best if you connect with one of the surrounding counties to transfer your membership to Virginia and then it would be easy to transfer over to Richmond. I will follow up with an e-mail to you so that we can stay in touch and try to get you plugged in with Richmond!
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Becoming a Master Gardener
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Date Posted: Wed, Jul 24 - 4:44 pm
- Hello! I am interested in becoming a master gardener, and I have found a program through Powhatan & Goochland. However, I'm wondering if there is one offered through Richmond? Thank you!
- Hello! Thank you for reaching out about becoming a Master Gardener! There are currently limited opportunities across the commonwealth as there are many open extension agent positions, including in the city of Richmond. We are hopeful that there will be two spaces for Richmond Master Gardener trainees with the Chesterfield unit this year. We should have more information about this possibility by early September. Should you decide to go through the training program with Powhatan or Goochland, you could always transfer your membership to Richmond once you have completed the training process. I will send you a follow up e-mail so that we can stay in touch about this!
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Fruit tree grafting
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Date Posted: Tue, Jul 23 - 10:36 pm
- Good Day! I am curious about fruit tree grafting. Specifically I am wondering about grafting fruit trees onto existing non-fruiting rootstock in my yard. Does that work? Are there parameters to making it work, as in, will it work but only with specific rootstock? My yard has some well established trees including some invasive mulberry. I would hope that the mulberry could be used, but I am also hopeful for the rest. Thanks for any advice you can offer.
- This is a great question! We are only aware of fruit trees being grafted onto rootstock of a similar species. For example, blueberries on to other blueberries, pawpaws on to other pawpaws, etc. We're still looking into this for you to see if we can find any example about grafting onto non-fruiting rootstock. If we do find information that supports this, we will follow up with an e-mail to you. In the mean time, you could try reaching out to fruit growers who may be more equipped to answer your question. A couple that come to mind that could be good resources for you is Agriberry here in Richmond and Edible Landscaping in Afton VA. Good luck!
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Invasive Plant Removal
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Date Posted: Thu, Jul 18 - 2:00 am
- Are there any volunteer groups or does Richmond City help get rid of Japanese Knotwood, Chinese privet and tree of Heaven. There is a lot of all three on the property adjoining mine.
- This is a great question! Removing invasive plants around the city is increasingly becoming a priority for many and its great to see! So many Richmond neighbors are helping to decrease invasives and bring more natives back to our area. The primary group that I am aware of that is currently tackling this work is the Invasive Plant Task Force that is connected with the James River Parks Systems. Their website is: https://jrpsinvasiveplants.org/ If the property you are concerned about is near the river they may be able to help. And they may also have other connections and contacts that they could provide to you. Thanks for reaching out - good luck! This is hard but good work!
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Home consult
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Date Posted: Sat, Jul 13 - 11:59 am
- Can I master gardener come out to my home to see if I'm gardening the right way? This is my first year and I'm not sure if everything I'm doing is correct.
- I will send you an email to follow up on this with you. Once I have more information, I will see if we have a master gardener available.
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Heat stressed Hydrangea
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Date Posted: Thu, Jun 27 - 2:13 pm
- We have a large hydrangea that has always been healthy and we pruned in late winter. We returned from vacation recently and it now looks like the attached picture (brown from bottom and inside). Any ideas on how to prevent this from spreading or it worsening? Thanks!
- This is most likely heat stress. We have had some very hot days and basically no rain. Hydrangeas are typically the first plant in the garden to show heat stress. The recommendation is to keep it watered, and just ride it out to the end of the season. It won't look so good, but it also should not die. If you have some shady areas of the garden, this plant can also be easily propagated using cuttings and rooting hormone. It roots easily and then you can plant the new ones in an area with a little more shade.
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Removing Pokeweed
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Date Posted: Sun, Jun 23 - 10:17 pm
- Hello, We have identified poke weed in our backyard. We have tried to slowly cut small areas down to see if it will end up dying. Are there any tricks to successfully remove poke weed naturally? I would prefer not to use chemicals if I can avoid it. Thank you for the help!
- Pokeweed has a taproot. This can make it difficult to dig up, but without using chemicals, manual removal is your only option. Be sure to wear gloves and goggles when working to remove pokeweed as it can be irritating to skin and eyes. You will want to loosen the soil and dig down as deep as you can to remove as much of the taproot as possible. If it has already flowered, you will want to make sure you are containing everything as you remove it so you don’t spread seeds around. Cutting everything back is another option to manage the pokeweed, but since you are not getting the root it will keep coming back. Good luck! This can be quite a task but rewarding once you have accomplished it!
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Problem with rose
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Date Posted: Mon, Jun 17 - 1:10 am
- Any suggestions other than takeout. I’ve tried need oil
- The picture you sent looks like a variety of wild rose. Many are starting to move away from planting roses as they are very needy and nearly as toxic as lawns to grow successfully. Based on the little bit of information that we have, we would recommend pulling the plant and replacing it with something else. Our recommendation is clematis virginiana if you are looking for a vining plant that is native. If you are hoping to find a way to keep the rose, this article has great information about different problems with roses and how to address them: https://fairfaxgardening.org/rose-problems/ Best of luck to you!