I have my hibiscus in a large ceramic pot with a good size hole for drainage and also about 2 inches of rocks. It's about 4 yrs old and the leaves are really scrawny and it's not very bushy at all, even in the summer. How can I get my hibiscus to get its bigger, bushier leaves?
Pruning should help and spring is the ideal time for it. This article will explain how to prune your hibiscus: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/tips-for-pruning-hibiscus-plants-when-to-prune-hibiscus.htm
Also, be sure that it's receiving adequate light, as too little light will result in a leggy, spindly looking plant rather than a nice full one.
I have two questions. The first is when should I repot my hibiscus tree? I live in Minnesota and I bought one last year. I want to repot it to match my other tree. When is a good time to do it? Now, before spring is in full force, to prepare for summer? Also, my trees seem to go into shock when I first put them out in the summer and again when I bring them in for the winter. All leaves turn yellow and most, if not all, drop off. I try moving them a little at a time (in and out as temperatures change). We live on a lake and have many spiders. I tried spraying before bringing them in last year, but it didn't work. Could that be part of the problem? The trees seem to be rid of spiders now though.
To your first question, spring is a great time for repotting. To the second, it is caused by it not acclimating. You sound like you are on the right track with moving them slowly, it just has to happen even slower.
The spiders are spider mites, probably. I recommend using neem oil on them. We have found it to be very effective. Here is more information to help you:
https://www.gardeningknowhow.com/plant-problems/pests/spider-mite-detection-and-spider-mite-natural-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
https://www.gardeningknowhow.com/houseplants/hpgen/acclimating-houseplants-outdoors.htm
I planted a hibiscus flower in a container 8 to 10 months ago and now it is 3 to 4 feet long and growing nicely, but the problem is that it is not producing a single piece of flower. Please suggest what can I do and give me fertilizer tips which I can make in my home.
Plants need to reach maturity before they can bloom. It may just need some more time to get to to the age where it can bloom.
You can also make sure that the plant is getting at least 5 hours of sunlight a day and give it some bone meal to add phosphorous. Sometimes if a plant is lacking phosphorous, it has trouble blooming.
It has sticky leaves with tiny white bugs on the leaves. It's been in my living room all winter and has bloomed profusely. Now after one week, the bugs and sticky leaves are appearing. It's loaded with flower buds and I don't want to lose it. I've had it for over one year and it has never stopped blooming, and I've had it out all summer and in all winter and it still blooms great. I live in Michigan and I just put it on the patio because I don't want to infect my fern.
From @Purpleblobrules - Whitefly- mix 1tsp stergene with 500ml water and spray drench often- til they're gone -good luck
It has scale. This article will help:
https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
I have been planting hibiscus plants in pots and they are more than five years old. I want to have a perfect bloom in my hibiscus pots. I place them where they can have more than six hours of sunshine. I actually want to know which fertilizer to use and how frequent to use it.
To encourage blooming on a hibiscus, you want to use a high phosphorus fertilizer. The phosphorus encourages more blooms and larger blooms. It is best to follow the directions on the package for frequency as different fertilizers come in different strengths.
My hibiscus has leaves that are kind of wrinkled looking and the last couple of years it has not bloomed. I keep it in house because every time I put it outside the leaves begin to lose all color and get white, like they are burnt. The wrinkled leaves I believe just started not too long ago.
It sounds like it may need some fertilizer. When you moved it outside, it was indeed getting burnt. This article will explain how to keep that from happening: https://www.gardeningknowhow.com/houseplants/hpgen/move-houseplant-outside.htm
I wintered my hibiscus in the garage and all of the leaves fell off. I now have it in the house and have been watering when dry to the touch. Nothing has come back yet. I just repotted it to loosen the roots and dirt. Is it dead, and how can I tell if it will come back?
If the branches bend instead of break, then they are still alive and will leaf back out. This article will help you as well:
https://www.gardeningknowhow.com/plant-problems/environmental/how-to-tell-if-a-plant-is-dead-and-how-to-recover-an-almost-dead-plant.htm