Nasturtium: Sowing, planting and harvest calendar
How do you sow nasturtiums under cover?
Sow nasturtiums under cover in spring, for example in March or April depending on your climate. Use individual small pots with drainage holes, filled with well-drained potting compost. Sow one seed per pot at the depth indicated on the packet and cover it.
Place the pots in a bright, frost-free position. Keep the compost slightly moist without waterlogging it. After germination, continue checking watering and light.
Gradually acclimatise young plants to outdoor conditions, then transplant them after the last frosts. Choose a sunny position and well-drained soil. Adjust spacing to the variety: about 30 cm may suit some nasturtiums, but check the packet instructions. Avoid overly rich soil, which encourages leaves at the expense of flowers.
Decide at sowing whether you are growing a compact or climbing type and keep its label. Separate pots let you move the whole root ball without untangling neighbouring roots. Moisten the compost before placing the seed, then let excess water drain away. When hardening off, start with short periods outside in a place sheltered from wind before gradually increasing their duration.
How do you sow nasturtiums outdoors?
How do you plant nasturtiums?
When do nasturtiums flower?
When do you harvest nasturtium flowers and leaves?
