Stratford Garden Festival
For those of you who don't want to wait until the "big" garden shows in mid-March, there is the Stratford Garden Festival March 4-7. From reading on the website, there are some excellent speakers all four days. I don't know how one could choose which day to go. This is a charity event, so admission is higher than the Hamilton show, but for $8.00 there appears to be much more for the true gardener.
Here is a link that might be useful: Stratford garden show