February to April, & September to November is the best time for sowing lettuce seeds.
loose, well drained soil that is rich in organic matter with soil pH around 6.0 to 7.0 is ideal.
Prepare potting mix with 40% garden soil + 20% cocopeat + 40%compost & fill in 8 to 10 inches sized pot.
Broadcast the seeds on the soil or sow them at desired distance at depth of 1/4 inches.
5 to 6 hours of full to partial sunlight is good for growing lettuce.
Keep the soil evenly moist but avoid waterlogging or soggy soil.
Apply two to four handful of any organic manure like vermi-compost, or leaf manure after every 20 days.
when they grow to about 3 to 6 inches long, then you can start harvesting leaves again & again.