If you truly got a hardy hibiscus and not a tropical one, it is slow to revive in spring, usually one of the last perennials to resprout in May or June.
Give it some time and here are care instructions:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/outdoor-hibiscus-care.htm
still alive. I just put it in the ground again. How can this happen?
Many hibiscus are hardy below freezing, as long as they are not a tropical cultivar.
This is likely the case here.
Here is a collection of articles that will offer more information on Hibiscus:
https://www.gardeningknowhow.com/category/ornamental/flowers/hibiscus
I have just received a hibiscus standard tri colour which is in bud. Should I leave it in the pot it came in until blooming is over and then transfer it to my own container.
Yes, let it go ahead and bloom so it doesn't experience bud drop from the stress of transplanting.
Here's an article that will help:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/transplanting-hibiscus.htm
My Dinner Plate Hibiscus has a tiny grub inside all the buds which is destroying all the flowers before they open. I have used standard insecticides with little success.
This sounds like a gall midge larva, or other bud eating insect. Proper gardening practice, such as keeping those infected parts trimmed off will be your first defense. Second will be pesticides.
In order for pesticides to be effective, they will need to be applied regularly. If you find yourself having to do this, then natural pesticides may be the best option. Here are some articles that will help:
https://www.gardeningknowhow.com/special/organic/what-are-organic-pesticides.htm
https:/c/www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/pests-on-hibiscus-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm
I cannot figure out why when they are right beside each other and there is plenty of air circulation.Wondered if you might know the problem it is not blooming.
Does the one that doesn't bloom get more shade than the other? Were they the same age when you planted them? Some can take years to bloom.
Given your hardiness zone, I'm going to assume these plants are all in pots and are receiving the same care. I think this article may have some answers for you:
https://www.gardeningknowhow.com/plant-problems/environmental/plant-not-blooming.htm
This may also be helpful: https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/hibiscus-container-care.htm
Pa, lebanon is where I am. Awful soil
If it is a hardy hibiscus, then yes. If this is a red tropical, then you will be best to keep it in container.
You will want to plant when the temperature of the soil stays around 50 degrees or so for the best results.
Here are some articles that will help:
https://www.gardeningknowhow.com/category/ornamental/flowers/hibiscus
nothing additional but thank you.
It is best to transplant when the soil remains over 50 degrees at night. That should be soon, if not already time to do so.
Here is an article to help you care for Hibiscus:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/how-to-care-for-hibiscus-plants.htm