m0useanswered grow question a month ago from their webpage, seems applying it as a soil drench with the leftovers is fine. IDK if I fully trust their product breakdowns into harmless P and K but who knows.
Plant Doctor Application for Medical Marijuana:
Please note – we have not personally tested on medical marijuana, however, these are the recommendations we’ve received from growers, so you may follow application directions at your own risk.
Downy / Powdery Mildew:
Foliar Application:
Cure Mildew: 1-2 TBSP per gallon weekly for mildew until clear then prevention.
Prevention: ½ tsp per gallon weekly
Soil Drench
Cure Mildew: 3 tsp per gallon weekly for 3 weeks or until mildew clears. Must be used separately in reservoir for 1 day (no other nutrients), because plant doctor will increase PPM and EC (electrical conductivity) of water. Drain reservoir and continue with normal feeding program.
Prevention: ½ tsp per gallon weekly
Fusarium:
Soil Drench
3½ tsp per gallon weekly for 3 weeks or until it clears then prevention ½ tsp per gallon weekly.
Must be used separately in reservoir for 1 day (no other nutrients), because plant doctor will increase PPM and EC (electrical conductivity) of water.
Drain reservoir and continue with normal feeding program.
Plant Doctor will not harm beneficial bacteria or mycorrhizae fungi.
It is formulated to target only pathogenic fungi.