http://www.trop-hibiscus.com/index.html
Try this site, it probably has as much or more info than you want. Rai.

Hi Mommabarb
I live in Burlington Ontario .. not far from Toronto either. I grow several types of hibiscus. With the tropical type I grow them indoors over the winter but as soon as spring arrives and there is no fear of frost they go back outside for the summer. Taking them in and out will affect their leaves and many will drop all of their leaves and remain in a dormant state only needing to be watered several times a month. But once they go back outside they will leaf up again in a few weeks. Make sure they are in a good tropical soil mix with good drainage and you will enjoy them for years to come. Oh and you might like to repot them in the spring into larger pots.
Hope this helps
Laura

Basically, I do the same as Laura. My hibiscus goes on the north deck in summer (morning sun only, though it probably can take more sun), then indoors in a south facing window for winter. When it goes outside in May, I treat it like any indoor plant gradually getting it used to the brighter sun. Despite this, it did suffer some leaf burn but quickly regrew leaves. I also trim it a bit because any growth it gets over winter is usually scraggly (my inside doesnÂt have the best light).

When itÂs time to go back inside in fall, check for bugs or wash the leaves with soapy water as the precaution. By the way, while my hibiscus is outside it tolerated a huge variety of weather conditions from heat to cold. As long as it doesnÂt freeze. I thought that my plant might lose itÂs flower buds after a few coolish 4C nights in September but that wasnÂt the case, so I think they are tougher than we think they are.

Glen

I too live in Burlington...!
I have a potted yellow hibiscus tree, about 7-8 ft high-ish, and I think we are heading towards our 4th summer together! I bring it in & out and am really dreading it, but I think it's time to re-pot! AYe-CaRUMba !
I was having amazing blooms all winter and no blooms all summer until someone told me to prune it in the spring before bringing it out and then finally last summer it was FULL of blooms!
My problem: I can't remember if I'm supposed to prune it in March or May?
...or Does it even matter???
Any suggestions? Thank You!