Top Questions About Hibiscus Plants

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Questions About Hibiscus Plants

Asked by
Anonymous on
August 30, 2019

Q. How to rid tiny green worms from hibiscus plant and blooms?

These worms have stripped the blooms and foliage from my hibiscus leaving only the stock.

Answered by
GKH_Susan on
August 31, 2019
Certified Expert
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Asked by
Anonymous on
September 2, 2019

Q. I live in Chocowinity N.C. which is on the east of N.C. I have two hibiscus plants that are planted in the ground. How often should

they be watered? And is it ok that they are dropping their leaves even the same ones? Can you tell me what zone I’m in? I think it’s 8.

Answered by
GKH_Susan on
September 2, 2019
Certified Expert
A.

Yes, you are in planting zone 8a. Hibiscus like moist soil, but not wet. So water often enough to keep the soil moist. Dropping leaves could be a sign of overwatering or underwatering.

https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-8/zone-8-hibiscus-plants.htm

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Asked by
Anonymous on
September 12, 2019

Q. Why do my luna rose mallow buds turn black in summer?

Have had this plant for about 2 years, and it happened last year too. After blooming quite well and profusely at the beginning of spring, the following buds turn black and fall off, and the plant doesn’t have any more flowers through the summer or fall, just a lot of black buds,. It’s sad and frustrating – what can I do?

Answered by
GKH_Susan on
September 13, 2019
Certified Expert
A.

Do not allow them to dry out between waterings. They need regular, deep irrigation. Also, be sure to fertilize regularly during the growing season.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm

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Asked by
Mpstare on
September 20, 2019
85249

Q. My hibiscus plants are turning yellow and dying – they are 3 years old and huge. What do I do? they are going fast.

We have had them 3 years; have had a very hot dry summer in Arizona.

Answered by
BushDoctor on
September 20, 2019
Certified Expert
Asked by
emandbillk on
September 21, 2019
96734

Q. Why do so many buds on my hibiscus fall off?

I live in Hawaii. The hibiscus plants are in large pots. There are no pests evident on the buds or leaves but a lot of buds turn yellow and fall off before opening.

Answered by
BushDoctor on
September 23, 2019
Certified Expert
A.

This can have a few causes.

The most common is lack of nutrients, or the wrong kind of nutrients. Too much nitrogen, or not enough phosphorus and potassium will cause bloom drop. You can offset by adding nutrients high in phosphorus and potassium, and continue with a high nitrogen feed during growing season when it is not blooming.

Another cause is not enough sun. They will grow very bushy in partial shade, but will not flower as well. They prefer full sun for proper bloom-set.

These articles will help: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm

https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/outdoor-hibiscus-care.htm

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Asked by
Anonymous on
September 21, 2019

Q. HIBISCUS HEDGE (LONG) WHAT FERTILIZER FOR SEPT-NOV AT HUTCHINSON ISL, FL

THE LANDSCAPER AT SEABREEZE CONDO TOLD ME HE CANNOT USE FERTILIZER CONTAINING NITROGEN FROM JUNE TO NOV. ONLY A FEW BLOOMS ON MANY PLANTS. BEFORE PRUNING IN LATE MAY, THERE WERE SO MANY BEAUTIFUL BLOOMS. THEY ARE JUST FULL MOF GREEN LEAVES. WHAT FERTILIZER SAFE FOR SOUTHEAST COAST OF FL?

Answered by
GKH_Susan on
September 22, 2019
Certified Expert
A.

Hibiscus should be fertilzied with a balanced fertilizer regularly but lightly to avoid overfertilization, which will result in less blooms. Here is the schedule and type of fertilizer
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm

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Asked by
lanasleonard on
September 22, 2019
81230

Q. What is the best systemic bug poison for my potted hibiscus?

My hibiscus has red spider. We have tons of spruce trees outside!
HELP! Lana

Answered by
BushDoctor on
September 23, 2019
Certified Expert
A.

It is very important to take all necessary precautions to ensure that systemics are used correctly. This article will help you with systemic use: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/systemic-pesticide-in-gardens.htm

Alternatively, you can use an organic systemic such as neem oil. This article will help: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

Acids in Rosemary oil have shown promise as a systemic as well, and is used by several companies for organic systemic pesticides.

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