Top Questions About Hibiscus Plants

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Questions About Hibiscus Plants

Asked by
jandj4194 on
July 20, 2019
19401

Q. Why do my Hibiscus buds get yellow and fall off

The buds come out, but do not bloom. They turn yellow and fall off.

Answered by
Downtoearthdigs on
July 22, 2019
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Asked by
Anonymous on
July 29, 2019

Q. Pruning Hardy red Luna hibiscus

I read an article you posted about pruning Hardy red hibiscus in the spring, down to the ground. Does this mean literally to the ground below the cluster where the branches all break off, or just above the ground and this cluster in order to keep the bases of each of those branches?
I just bought one and live in southern MN. I will plant it soon and it will be outside over winter so I will try to apply mulch around the base before snow. Just wondering Mai ly how far to prune, if needed.
Thanks

Answered by
Downtoearthdigs on
July 29, 2019
A.

In your area, this thing will struggle to survive winter, even with covering. I would recommend burlap, heavy mulching, anything that it a HEAVY insulator. These are hardy to zone 5, and you are in zone 4.

With this being said, It may not get huge. More than likely it will die back to the ground anyway, coming up from brand new fresh growth each year... With heavy protection in the winter that is.

However, with very heavy protection, and leaving some of the stump, you may successfully keep some old growth alive. This will allow for a larger shrub

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Asked by
Kramyelda on
July 29, 2019
Long Beach, CA

Q. What is this on my hibiscus plant? And how do I get rid of it?

What is this on my hibiscus plant? And how do I get rid of it?

Answered by
Downtoearthdigs on
July 30, 2019
A.

This is from a long infestation of White Flies.

This article will help you.

https://www.gardeningknowhow.com/plant-problems/pests/insects/whitefly-control.htm

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Asked by
Anonymous on
August 4, 2019

Q. hibiscus likes to lay on the ground

I have two hibiscus bushes and this is the first year they like to lay on the ground .
What can i do – they are so beautiful.

Answered by
GKH_Susan on
August 5, 2019
Certified Expert
A.

You may need to do some corrective pruning to balance the lopsided shrubs. Prune during mild weather so the plant can recover easily, avoid pruning when a cold spell is coming on. Remove stems to about 6 inches from the ground that are misshapen, crossing other branches, damaged or top heavy, causing the plant to lean one way.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/pruning-perennial-hibiscus.htm

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Asked by
co692op on
August 6, 2019
7a

Q. Hibiscus

Every year my hibiscus plants develop circular black spots on the leaves. They yellow, turn brown and fall off. It doesn’t seem to hurt the blossoms though.

Answered by
BushDoctor on
August 6, 2019
Certified Expert
A.

This sounds like it could be a mild fungal infection. I would suggest using a fungicide on the upper portions of the shrub. This article will help: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

I would also treat the soil with a handful of DOLOMITIC LIME and a teaspoon of WETTABLE SULFUR once or twice each year. This will help to prevent the issue in the future.

This article will help you to grow Hibiscus: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm

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Asked by
metamcykala on
August 9, 2019
El Campo Texas 77437

Q. Hibiscus in pots. How far apart do they have to be so they don’t cross-pollinate?

They cross pollinate and do not stay original color that I bought if they are side by side on the patio.

Answered by
BushDoctor on
August 9, 2019
Certified Expert
A.

This is not a cross pollination issue. A cross pollination issue will only show in the next generation seeds.

I'm afraid that this is caused, partly, by genetics and also by environment. This article will help: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-turning-different-color.htm

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Asked by
victoria.glisson on
August 10, 2019
savannah,ga.

Q. hibiscus stopped blooming

My hibiscus bloomed great when planted, but stopped blooming after 3 months in Savannah,GA. Planted with Miracle Grow in sandy soil.

Answered by
BushDoctor on
August 12, 2019
Certified Expert
A.

Most miracle grow products contain slow release nitrogen, and quite a bit of quick release nitrogen. This will halt flowering. This would be my first guess. You will have to offset this with potassium and phosphorus, or by raising the pH just slightly.

This article will give you more information: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm

This article will help you to grow Hibiscus properly: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm

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