It’s only days away. I know frost-free days aren’t expected until May. However, mid-March is seed starting time — even if you’re starting yours on a sunny windowsill and not under grow lights.

The sun is much higher in the sky as we approach the spring equinox. The bare trees and the snowy ground allow the bright spring light to enter the home and encourage seedling growth. To get the most benefit from this light, be sure to clean the inside window panes.

So, why is mid-March an ideal time to start seeds? It’s basic arithmetic. Calgary’s traditional last frost date...