The soil and sprouts should not be constantly moist. I use a $12 meter from lowes that tells me what the water level is at the bottom of the pot. (Wet, Dry, Moist). Water until the meter says moist and the excess stuff comes out the bottom. Let them sit until the meter is on dry or a low moist, and than I water again.

Do not over water because that is the biggest common noob mistake and will kill your plants (I learned the hard way). Always use room temperature water (distilled works good). I like to spray the top of the soil with a spray bottle and also spray the leaves. I do this maybe once a day.

White widow can grow pretty tall and that probably wont be enough space for 3 plants. Be careful because they could get contaminated being that close together from a male plant.

You are on the right path b ut make sure to not over water!

Good luck


PS "I've read others say that miracle grow for seedlings are bad". I used Miracle Grow Moisture Control and my plants are doing just fine. I just used a different soil when I transplanted.