Some keerai you buy from shops can be grown very easily – siru keerai, arai keerai, thandukeerai, paruppukeerai (amaranth leaf vegetables).
After preparing the pot with potting mix, sow the seeds mixed with sand, pour water gently and cover the seeds with some more potting mix. Now cover the entire surface with newspaper and pour water over it.
Pour water everyday to maintain moisture. On the fourth day morning remove the newspaper and you can see the seedlings.
Spray water using sprayer for ten days. Continue growing. You can harvest within thirty days.