Q.Dwarf Lime Tree - I have had a dwarf lime tree for about a year. I have it in the small green house. It ...
A.I would give it some more time. Lime trees need to be 3-5 years old before they will bloom. Older if they are started from seed. If the plant looks otherwise healthy, give it another year or two to mature ...Read MoreQ.Trimming A Rubber Tree Plant - My rubber tree is getting too tall to fit in my small greenhouse. Can I cut the tops off, and ...
A.You can cut off the tops and the plant will put out side shoots to compensate for the pruning. The branch you cut will not grow any longer, but other branches will develop to take its place for height of ...Read MoreQ.Vegetables That Tolerate Black Walnut - My neighbor's black walnut tree has made my vegetable gardening difficult. Are there any vegetables which can tolerate their toxin?
A.Hello and thanks for this question. When I lived out on the farm we had several Black Walnut trees that presented me with such a challenge. I found that I could grow corn, squash, melons and carrots okay. Also lima ...Read MoreQ.Black Leaves On Crape Myrtle - We have several crape myrtles on our church grounds. Also, the church is in Orange Beach, AL and is about ...
A.This is sooty mold, a common problem with crepe myrtle trees. Here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htmRead More
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Q.How Location Affects Plant Growth - Why and how does the location affect plant growth?
A.This is a wide ranging question. Many plants love the sun and will only do well with good full exposure. Some will do okay but never reach their full potential in partial sun and will be stagnant or die in ...Read MoreQ.Spraying Hibiscus For Bugs - We live in Cocoa Beach, FL and our hibiscus is looking bad with bugs, etc. What is the best thing ...
A.I would recommend neem oil. You can learn more about it here: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htmRead MoreQ.Azalea With Yellow Leaves - My azalea has been extremely healthy all summer but now has lots of leaves turning yellow and falling off. HELP!!
A.Did you fertilize it recently? The are easily burned by fertilizer and this is known to cause sudden leaf drop in the plants.Read MoreQ.Bird-of-Paradise Won’t Bloom - My bird-of-paradise was planted in 2007. It has grown to over 8' tall, has lots of babies around it, and ...
A.I would wait. They need to be a little pot bound to bloom and removing the babies will counter this. If you have not read it, this article will help you: https://www.gardeningknowhow.com/ornamental/flowers/bop/bird-of-paradise-blooms.htmRead MoreQ.Yellow Tomato Leaves - I started a raised garden in south FL, and amongst many veggies I have 3 tomato plants in pots. One ...
A.For tomatoes in pots, it is either a watering issue or a fertilizer issue. Make sure that you are watering them daily and add some slow release fertilizer (such as Osmocote) so that they get continual feeding.Read MoreQ.Planting Zone - What planting zone is Lenhartsville, PA? Also, can I plant cannas now and leave them out all winter?
A.Hello and thanks for contacting us at Gardening Know How. Follow this link for some help with your zone. Looks like you are either zone 6 or 7, https://www.gardeningknowhow.com/planting-zones/pennsylvania-planting-zones.htm In zones 7-10 cannas can be safely left in the ground during the ...Read MoreQ.Trimming Red-Tip Photinia - How and when do you trim/prune red-tip photinia (in Austin, TX)?
A.Prune your Photinia anytime between spring and early fall, with late spring/early summer more acceptable. Red Tips are excellent candidates for rejuvenation pruning. To rejuvenate the plant, cut it all the way back to the ground...to about 6 inches from ...Read MoreQ.Watering Gardenias - How much should we water outdoor gardenias?
A.Outdoor gardenias planted in the ground need about 2" of water a week. This includes rainfall.Read MoreQ.Aerial Roots On Cheese Plants - I have inherited a Swiss cheese plant which needs some TLC. It is about 10 feet high. First, it needs ...
A.It is not recommended that you remove the aerial roots. If you prune them, you can open the plant up to disease. If possible, give them something to cling to, like a moss covered pole. This will keep them controlled ...Read MoreQ.Spots On Pothos - There are brown spots on my pothos. Why? How do I fix it? Also, I have a Sansevieria with similar ...
A.Brown spots and edges in houseplants are typically caused by watering issues. I would first check if they are rootbound. That is most likely the cause. This article should help you: https://www.gardeningknowhow.com/plant-problems/environmental/what-causes-brown-edges-on-leaves-of-plant.htmRead MoreQ.Eucalyptus Treatment - We have very large older Eucalyptus trees in our backyard. It is now mid November, and we had the trees ...
A.If they are well established, they should be fine. Making sure you are caring for them as best you can is the best thing you can do to help prevent disease from getting in the pruning wounds while they heal. ...Read MoreQ.How Do I Know When To Harvest A Sweet Potato? - The plant has green and white leaves. I don't know whether I should just pull on it or what?
A.Tubers normally do not form until later in the season when the plant begins to prepare for winter. Allow them to keep growing. On average, it takes about 95 to 120 days after transplanting the slips to have mature sweet ...Read MoreQ.Brown Spots On Hydrangea Leaves - I have 8 hydrangeas in my garden, all on the same side of the house, facing east. About 3 of ...
A.It sounds like you may have a fungus. This is a common cause of spots on leaves. I would recommend treating the plants with a fungicide and destroying anything you prune from them so the fungus does not ...Read MoreQ.Frost On Rubber Tree - I have a rubber tree house plant that has been frost bitten. What should I do?
A.If the stems are still alive, it will regrow its leaves. I would check the stems and if they are still alive, care for the plant as you normally would and you should see leaves start to grow in a ...Read MoreQ.Cutting Back Rubber Tree - Can you cut back a rubber tree to make it come back more full?
A.Yes, trimming the plant back will result in a nice, full tree. Here is an article that you may find helpful: https://www.gardeningknowhow.com/houseplants/rubber-tree/prune-rubber-tree.htmRead More
