I recently had allot of foliage die within 2 days on both my purple diesal outdoor soil plants. Used pure blend pro grow and followed feeding schedule , i first thought it was a nitrogen deficiancy and fed it skightly more food but it didnt help , since the nutrients were all there with a balanced ph i researched and determined a lockout was the issue . I flushed my plants, trimed the dead grow and started them on pure blend pro bloom a week ago and haven't had any sick signs till today I found some more leaves yellowing . Could this be from the lack in nitrogen in bloom formula? and if so what would be a good solution ? any help would be great ty! . They are just starting to have tiny buds all over but I know the leaves don't typically yellow till they are fully flowered.