Are these aphids? These orange things are growing on the branches of my hibiscus plant. How do I get rid of them? Thanks in advance for your help.
I was able to identify these as Red Tube Tailed Thrips.
Use Neem Oil to treat the plant. Retreat weekly until the issue is resolved.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
Our hibiscus were good last year but are not doing so well this spring, leaves yellow and sparse. Feeding and spraying with pyrethrum do not seem to make any change.
This can be caused by excessive heat, drought, or overwatering. It sounds like nutrient deficiency and pests are not the cause, but the others listed here are possibilities:
My problem is little typical and I have done everything to solve it but haven't got any success. I am guilty of using malathion pesticide on my hibiscus and I came to know quite late that malathion is toxic for hibiscus. Ever since I used it, my hibiscus stopped growing and flowering. It's been three years and it's in same condition as in the snap I have uploaded. It's a yellow colored hybrid variety. I even pruned it down last year to reduce the burden on plant but have been seeing just little growth and that too on tips. One thing I noticed is the tips of branches are quite thick and I don't know why is it so. Please help me take my plant out of this shock. I am losing hope.
I am not sure why this hibiscus is still reacting to the Malathion after so long. I suspect it also has a zinc deficiency, which causes tiny leaves, pale green or yellowish patches on the leaves, and little or no growth. A gardening store may be able to provide you with a zinc spray such as zinc sulfate. This should help the plant start growing again.
If you aren't already, follow these instructions for removing 1/3 of the plant per year when pruning:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/tips-for-pruning-hibiscus-plants-when-to-prune-hibiscus.htm
I have hibiscus plants in a sunny easy facing location. They have lots of buds but they fall off before blooming. There are no visible pests or fungus. What can I do?
Bud drop can be generally corrected.
This article will help you.
How do I tell which type of hibiscus I have (i.e. hardy or tropical)?
Tropical Hibiscus are an evergreen that keeps it's leaves year round.
They are hardy in zones 9 to 11 and need to be moved indoors for winter in colder climates.
Hardy Hibiscus are deciduous and drop their leaves off in Winter. There are over 200 species of hardy Hibiscus.
Most hardy Hibiscus can grow in zones 4 and above.
These plants winter over outdoors and are generally planted directly into the ground.
Here are some articles with more information.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
https://www.gardeningknowhow.com/ornamental/shrubs/rose-of-sharon/rose-of-sharon-bush.htm
My Hibiscus is very old and about 20' tall and not sure how much and when would be best to trim. Any help is appreciated.
I must assume that you are referring to a Hardy Hibiscus or Rose Of Sharon.
This article will help you.
https://www.gardeningknowhow.com/ornamental/shrubs/rose-of-sharon/pruning-rose-of-sharon.htm
Why the buds are formed but the petals never open up? Thanks.
This is a common problem with hibiscus. It is normal for some of the buds on a hibiscus plant to drop off without opening, but if all the buds are falling off, see this article: