Powdery Mildew on Indoor Mint + Pruning Guide for Kitchen Herbs

White powdery coating on indoor mint = powdery mildew. Caused by low light, poor airflow, high humidity.

Fixes

1. Move outdoors: Mint needs outdoor cycles to thrive.
2. Prune: Cut all mildewed stems to ground. New growth will be clean.
3. Spray: 1 tsp baking soda + 1 qt water + drop soap. Weekly.

Pruning for Kitchen Harvest

• All herbs: Cut 1/3 from top down every 3 weeks.
• Cut above leaf pair: 1/4" above, leave 1+ pairs.
• Basil: Pinch flowers (cut 3 pairs below).
• Mint: Aggressive pruning controls spread.
• Rosemary: Shear green tips only.

Indoor Reality

Thyme, oregano, catnip must be outdoors to go dormant and return. Rosemary only if hardy variety ('Arp', 'Hill Hardy'). Parsley/cilantro last until frost. Basil needs 16h light/70°F+.

Grow the right herbs indoors (cilantro, parsley, chives, dill). Move the rest out.