I have tried a number of times to grow from corms. I have planted into pots, 4 inches deep. I get nothing. I water once and routinely check the soil moisture. Do they need warmth over 60 degrees? What is missing. I have no example to show, just empty pots. I have been a landscape designer for over 25 years and am just stumped! Thanks, Mary Czisny Kanavas Landscape Management
Growing Crocosmia From Corms
Certified GKH Gardening Expert
Yes, 60 degrees would be the minimum for sprouting. If you want a headstart, you can put them in container, and put them under lighting until the soil warms up a bit. Depending on your area they may not be hardy, but that is not likely.
This article will give you more information: https://www.gardeningknowhow.com/ornamental/bulbs/crocosmia/crocosmia-bulb-care.htm