Ask John

BearTools_Fotor If you have a question about gardening in the Birmingham area, ask John. John Floyd has been gardening–and learning about gardening–for more than 30 years. In addition to his day-to-day experience in the garden, John has degrees in horticulture, plant taxonomy, and plant physiology from Auburn and Clemson Universities and was Editor-in-Chief of Southern Living.

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How short should you cut the zoysia in the winter 18. December 2017

I leave mine at the same height I cut it during the year. BUT, I cut mine in the winter several times to keep the leaves and debris off the dead grass. I guess you can cut it shorter but I wait until early spring and lower it one wheel height of the mower if I think it needs it. One final thought. I bag my cuttings which I think it is important for zoysia.

I have a brown turkey fig tree in a large pot next to a south facing brick wall. I’ve wrapped the pot with black plastic and stuffed pine straw between the plastic and the pot. Should I also wrap the tree limbs or is just protecting the roots enough to overwinter outside. It’s too heavy to move indoors. 23. November 2017

I am no expert on this subject but when I go to Petals From The Past and see how they protect their citrus from cold temperatures; they cover the entire plant. So my guess would be covering the whole plant is best.

Are Tulips difficult to grow in the Birmingham area? 10. November 2017

Not at all. I suggest that you plant them between mid-November after the weather cools through about the first two weeks in January, If you have purchased them and are not ready to plant, refrigerate but not in a plastic bag until you are ready to plant. I currently have mine on order and will refrigerate until we have continuous cold night probably plant in December

I have the ugliest mushrooms growing in my front yard and they smell awful an bugs feast on them !!!! Please help me my daughter is afraid to get out the car because of bugs an smell, thank you Brenda Mckenzie is my name my contact info is 5410275 14. October 2017

I think I have seen more mushroom types this year in yards than ever before. I put a plastic bag over them and pull them up and tie in a plastic bag bugs and all then discard it. Once the mushroom is removed, sevin might control the insects. Do not know for sure until I see an image of one but generally mushroom removal is the key to getting rid of bugs.

Is it okay to put out General Purpose Fertilizer 15-0-15 on (Aureo-Marginata) shrubs now? 20. September 2017

Yes but it is a bit late in the season.

My magnolia trees have lots of dead limbs on them. I’ve noticed others around town doing the same. What’s wrong? 17. September 2017

Well, I think we can blame it on two issues. One this is the natural time for dead branches to dehiss from the trees especially with the winds of recent days. Second, many of our trees were stressed last year in the drought so many of the already weak limbs died over the spring and summer causing additional dead limbs. I really do not think you need to worry about loosing the trees especially if they have looked healthy all summer.

Where do you buy your General Purpose Fertilizer 15-0-15. I can’t seem to locate it in a couple of nurseries and Lowes and Home Depot here in the Hoover area. 31. August 2017

Ewing Irrigation in Pelham

First, thank you for speaking to Alabama Hydrangea Society yesterday. I enjoyed your talk very much. Please tell me the Ortho Care product you recommended for shrubs instead of spraying. Also, I need to know the best fertilizer to use for shrubs.(Aureo-Marginata). 25. August 2017

Ortho Tree and Shrub grandular insect control. My general fertilizer recommendation is 15-0-15 for most shrubs in our area as we generally have high levels of phosphorus in our soils. In spring if you want to foster additional growth you can increase the nitrogen number but I only do that is the plant looks poor.

I have just purchased a home and inherited these hydrangeas. How should I care for these to bring them back to a healthy state again? Also what variety are they? Thanks so much for any tips! 21. August 2017

If you sent an image I did not receive it.- john

We want to bring wild hydrangeas from the woods at our lake house in tallapossa county to our home in Hoover. When should we consider transplanting and what preparations should we make in Hoover? 21. August 2017

First, tag the ones you want to move now. If you can go around the drip line of the plant (the outer edge of the leaves) and insert a shovel in the soil to cut the roots if posssible. Then this winter dig the plants and transplant them to your garden.

Best care for fig bushes? 17. August 2017

Right now do nothing except water when needed. After the foliage come out in the spring fetilize lightly with a product like 5-10-10. They in my mind are one of the most care free fruit trees you can grow.

when and how much can you trim hydrangeas also arolina Jasmine 17. August 2017

Florist type hydrangeas should be pruned now as the new growth this fall is where they will bloom next year. It is so late now I would not reduce their size over about a fourth. All of the other Hydrangea types I would not prune until late winter before any foliage appears. As for Carolina Jessamine, it can be done anytime but to prevent bloom loss prune after they finish flowering in the spring.

Is it too late in the year to trim boxwood and apply Bayer Advanced Tree & Shrub Protect & Feed? 8. August 2017

Trim is the right word or maybe a light shape is ok now except on old-English box and I would be very careful with old American Boxwood,too. Removal of awkward branches or new growth is fine.

I have a promgranite tree that i have had three years and has not produced any fruit . Do you know if it needs another variety? 27. June 2017

No, but more than likely this year the blooms were affected by the late freeze. Also, it may be just too young to put on any fruit. You do not need another one to produce fruit, but in this region my experience is that they are not heavy producers.

Im having a terribel time with Aphids this year, mostly on my tomatoes… I have sprayed with Insecticidal Soap, Neem oil and a combo of Neem and Pyrethrin. They are relentless. Any thoughts or ideas? 21. June 2017

I am sorry you are having such a problem. Seems like you have tried most things. Soapy water sprayed on the leaves followed by a strong hose spray many times helps reduce them initially. Then hose spraying when you water will keep the majority of them off the plant. While not a control, it works to limit the amount on the plants.

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13 thoughts on “Ask John

  1. Greetings John, My beautiful Peace lillies have an infestation of a scaly type of insect…aphids…I attempted to eradicate them by cleansing the stems and leaves with a damp paper towel and then followed up with a banana peel. As a deterrent, I would break off pieces of the peel and place around the top of the dirt. This seemed to work for a little while, but then I notice some of the leaves begin to grow limp and then turn yellow and I just cut them off. I would appreciate any suggestion and I really prefer the “Natural” remedy, but am open to whatever help you can offer. Thank you.

  2. thank you for replying re: fertilizing my various hydrangea types. I’m going to purchase the 15-0-15 you suggested and I plan to put some, dry, around the base of each plant. Some are very mature–the latest additions were planted in October, 2014. OK to treat all one time either now or very early summer? Thanks again.

  3. I transplanted some daffodils several years ago from my family home in Grove Hill, AL. The blooms do not seem as bright and yellow as they did in their previous environment. Is there a food they need to be more colorful and not so pale yellow? The foliage looks great; only the flowers are not as bright.

    • It might be several things, but usually the depth of color is pretty constant. Once they finish blooming, I would give them a bit of fertilizer. There are products especially for bulbs, but an all-purpose fertilizer like 15-0-15 (which is what most of us need to use in this area) can be sprinkled throughout the foliage. Also, if the bulbs you dug were in a sunny spot, and yours are in shade, that might affect the color somewhat. Other than that, I really do not have any ideas. Let’s hope next year the color will be brighter and clearer.

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