Apply a handful of woodash to each plant and water them.Apply a handful every month.Keep them in a sunny spot protected from too much rainfall.Don't over water them.They don't like wet feet.Dont disturb the roots too much.Only at the time of application of wood ash rake the soil lightly to incorporate the ash into the soil.Try changing the small planters.Hope you find it helpful.Happy gardening n wish u a bountiful harvest soon de