Maybe just keep them in big enough pots for a month or so, and then plant them outside with some protection. I'm in central NY, which is not that far from southern Ontario. I put mine outside May 1 with protection. If you are in northern Ontario it might be more of a problem. I'd hate to toss big plants.

I would also start some new ones just in case these don't make it. You clearly have plenty of time to start them. It will be difficult to keep these going that much longer without some major expense in pots, potting mix, and time and effort.

Dave

Thanks for the info. My guts says plant more, just in case these are not suitable in 2 months time.

Would you be interested in using Wall-O-Waters? I put mine out the other day. I buried them deep in hopes that they don't grow out of the top before the weather stabilizes. If they do, I'll have to cover them on cold days and nights.

Another option would be to take cuttings from your current plants and root them to keep them going. I recommend rooting them in your growing medium that is kept fairly moist until the cuttings have established roots, usually 3 - 5 days. They will wilt at first, but when they perk up again, they have made roots.

I've done this to keep some going that were getting too big indoors when we had weather that turned cold for longer than usual in the spring, and I have propagated extra plants by taking cuttings. (Faster than restarting from seed.)

Betsy