Utricularia longifolia Gray Mold and Greenhouse Climate Control on a Budget

Treating U. longifolia Mold

White patches = **gray mold (Botrytis)**. U. longifolia is prone due to waxy leaves. Treatment: **Neem oil** applied with a cotton ball (gloves on) to rub into leaves. It rarely kills the plant – just looks ugly.

Greenhouse Cooling (Memphis, TN – 90-100°F summers)

• **Invest in thermostatic vent fans** – auto-open at set temp. Spring/fall manual venting causes mishaps.
• End-wall fans work but lack automation.

Greenhouse Heating

• **Primary: 240V electric** (wire for it during build). 1500W may be undersized for 10x15 ft.
• **Backup: Vented gas heater** (e.g., Yaunco Orbis CC3LP). Unvented gas damages plants.
• Propane backup for power outages.

Automation prevents the "hot day/cold night" spring/fall rollercoaster that kills plants.