A few months ago, I planted a seed. I never used any lights or anything for it. It grew to about four feet tall and then I noticed a bunch of white spote on the leaves. A month after that it dried up and died. So, I am starting over. I planted a bunch more seeds, but I don't want the same thing to happen to them. What can I do to prevent that? What were those white spots? And do I have to use lights? Thankyou in advance for all your help!