Grape before I put the seeds straight into the soil I did pre soaked the soil with water until I see run off and next watering is like week or week and a half later when I feel the pot is very light, and form then on when the seedling is small I use the finger method (sticking my finger into the pot about 2-3" down) and if it feels dry then I water with about 500ml-750ml of water, when she's get bigger I always water until I see run off from my pot and then I go by the weight of the pot. As for feeding I'm doing water, feeding, water, feeding, water, feeding etc. I feed every other watering unless she likes it I'll do feeding every watering. But for now I do water, feed, water, feed.