After preparing the land to a fine tilth:
Make drills/furrows 30 cm apart for production of fresh leaves and 50 cm apart for seeds production.
Mix well rotten manure and planting fertiliser on the furrows. You need 12 buckets of manure per 1 metre square plot. Use planting fertiliser like Mavuno Vegetables fertilizer N.P.K 20:10:18 and later Top dress with Mavuno Topdressing N.P.K 26:0:0.
Sow seeds 2-3 cm deep and cover lightly with soil. You need 2 kg of seeds per acre.
Water regularly i.e 2-3 times in a week. This is when the soil is dry and avoid water logging. Lack of water can also lead to early bolting (start making seeds early).
Germination occurs about 7-10 days after sowing.
Thin to remove excess plant and leave healthy ones when plants are 5-7cm high to leave 10-15cm within the rows.
You can cut at half foot high to encourage growth of more tillers.
It will take 4-6 weeks for green leaves to mature and 3-4 months for the seed.
It is recommended to sow seeds directly into a ready seedbed. Transplanting causes early flowering. Buy certified seeds from good sources.