Will fluorescent lights be enough light for wintering hibiscus?
The plant requires bright light, which in your zone (even in winter), should not be an issue, though sunlight in winter is less intense. You can, however, try supplementing the light with a fluorescent bulb placed 1-2 feet away from the plant. This should be enough. Worse case scenario, your hibiscus will go dormant without enough light but will "wake" up with the return of spring.
I planted some hibiscus seeds last spring and these plants came up after a prolonged time period. Would these happen to be developing hibiscus plants? If so, can I expect them to come back next year? This photo was taken yesterday.
The leaves are somewhat reminiscent of hibiscus, but whether or not they come back next year really depends on the types of hibiscus you planted. Hardy hibiscus varieties can survive outdoors and will return each year but the tropical types cannot. These must only be grown indoors. All you can really do is just wait and see, though it may not hurt to pop one of these up and put in a container to over winter inside - just in case, so you will still have one.
I live in Connecticut and I have a hibiscus plant that is planted outside and comes up every year. It's beautiful but has become very large for its area. When can I dig it up and transplant it? And I'd like to separate it and give some to a friend.
Early fall is a great time to transplant a plant. Don't wait too long into fall, or else the plant will not have time to establish before cold weather sets in. If you cannot do it this fall, spring is also a good time.
The buds on my hibiscus has what looks like a white powder all over them. What is it and what can I do to control it?
This is Aphids.
I see some yellowing to the leaves also. This could indicate some watering issues.
Treat with Neem Oil, as this works as both an insecticide and fungicide.
Do this weekly until the pests are gone and as a preventative.
Here are a few links for you.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-sticky-leaves.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/answers-to-what-causes-hibiscus-leaves-turning-yellow.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-fertilizing.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
My dad has a white flowering hibiscus but, each year, one purple flower grows on this plant. Is this unusual and why does it happen? Thank you.
Though the reasons are a lengthy scientific report, it basically is due to the pigments in the flowers and environmental changes.
Yes, the plant can produce blossoms on one plant that may be different from the others.
We have the dinner plate type of hibiscus and this is the first year we grew them. Can they be pruned and covered for the winter? We live in Chicago, so it gets quite cold. Thanks for your help.
I have little egg looking things on the underside of my leaves and my new buds have died without blooming. I'm thinking some type of bug. How can I get rid of them and make my plant healthy again? My leaves also have yellow/brown spots on them.
Likely Mealybugs, and they can be treated with Neem OIl.
Treat the plant weekly.
Here are a few links for you with more information.
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-sticky-leaves.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/mealybugs-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-flowers-hibiscus-blossoms-falling-off-plant.htm