Hi, my earthboxes are working great! Been using them to grow tomatoes the last 2 years. This year I planted some basil in one. It seems that my basil leaves are turning yellowish green. The soil is very moist and absorbing all the water from the bottom, but the roots actually seem dry. Is it better to let the soil dry out a bit or continue to keep filling with water for the roots to sit in to bring back that rich green color? Thank you!