I live in central western New Jersey. The plants I (Hisbiscus) have are perennial. This is my first year working with flowers, and the Hibiscus was planted in July from pots. They have done well, but I want to be sure I prune them properly this fall. We often have many weeks sub freezing and can see a few feet of snow on occasion. I've been told to cut them all the way back. Yes or no?
Some people do and, because they are such rapid growers, they will come back full force next year. But it is not something that is necessary to do. Some people like to cut them back like that every year to help keep their size in check.
Why are my hibiscus leaves turning yellow?
There are several reasons this can happen. This article explains many of them and will help you decide which is likely for your plant: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm
I have an Hibiscus that is to stay outside. I live in Le Mars, Iowa, so it freezes here. Should I cut it down or cover it when it starts to freeze?
It depends on what kind of hibiscus you have. If it is a tropical hibiscus or a hardy hibiscus. If it is a hardy hibiscus, it should be fine without protection. If it is a tropical hibiscus, it will not survive outside under any circumstances where you live.
I have two Luna Hibiscus plants that are 2 years old. They have bloomed both summers and are now too large for the garden. I would like to move them to another area in my yard and would like to know how and when to move them. I live in S. Carolina and the plants have wintered well outside in the garden even though they both looked dead in the spring.
Early fall is a great time to transplant them. Don't wait too long into fall, or else the plants will not have time to establish before cold weather sets in. If you cannot do it this fall, spring is also a good time. Cut back the plants to 1/3 their size, then dig them up and replant elsewhere. Make sure to keep them watered well while establishing. Also, keep in mind there may be some stress associated with transplanting but this should improve once the roots become established in their new location.
How do you grow hibiscus from seed?
This article should help: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-propagation.htm
Most likely this is just a normal reaction known as transplant shock. Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm
Your hibiscus can be treated with neem oil. This article will provide more info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
For additional information on preventing or controlling white flies, this article will help: https://www.gardeningknowhow.com/plant-problems/pests/control-whiteflies-on-houseplants.htm