how cucumbers are grown in a greenhouse
Planting Cucumbers in a Greenhouse Planting Cucumbers in a Greenhouse. Growing cucumbers in a greenhouse starts off with sowing the seeds, 2cm (Â¾in) deep, in 8cm (3in) pots around April or May time. Keep the pots indoors (or in a heated greenhouse) until all risk of frost has passed (ie. the very low temperatures are over).