John from Houston writes
Monterey Garden Phos Systemic Fungicide is labeled for treating Phytophthora root rot for various crops and Japanese andromeda, Japanese Holly at 2-4 tsp per gallon of water (foliar rate, please see label for full application instructions/dilution rates. We recommend that you confirm that it is root rot, drainage, mineral deficinicy or other disease with your local cooperative extension office Master Gardener.
Answer last updated on: 08/17/2018
