February is an underrated month; snowdrops and other highlights of winter plantings are reaching their peak and it’s a time to relish the prospect of the gardening year ahead – all the best moments are just around the corner. If really cold weather does strike now, it is likely to be mercifully brief. With a greenhouse, that threat is reduced, so your picture is brighter still. While last year’s patio pots of dahlias and cannas are likely tucked away under the benches awaiting longer days, with a little extra warmth the first seed sowings can begin of this season’s delights, perhaps pelargoniums, cosmos, chillies and tomatoes. But more immediately, even in an unheated, or better still frost-free, greenhouse, some permanent residents will be looking superb right now.
Flowers under glass
In a small, cold greenhouse, you might try correa, compact, reddish-pink and yellow and pink; all can withstand a few degrees of frost.