water as neeeded, maybe eveyr 3 days depending on size of plants, small plants need watering less while bigger plants need more water, obviously, jus poke the soil 1.5 - 2 inches and if its dry water if its moist its good for another day !!!, and ground dirt is sh!te basically, where u from? if UK goto B&Q, get pealess soil, perlte and gravel, mix 50/35/15 50% soil 35% perlite 15% gravel, this will give good air circulation for roots