Botanic Garden >> Gardening > >> Question and Answer >> Plant Species >> Carnivorous Plants

Physan 20 Fungicide: Overuse Can Burn Roots

A German grower sprays Physan 20 monthly in winter, drenching crowns/rhizomes, and asks about overuse risks.

Quaternary Ammonium Compounds Can Burn Tissue

Physan 20 is a disinfectant-class chemical. Overuse burns roots and living tissue. Sarracenia are tough, but follow label intervals (every 2 weeks max). Monthly winter use at label rate is likely safe.

Carnivorous Plants: Dwarf Burford Holly Leaf Spot in Extreme Heat; Fungicide and Neem Oil Use on Carnivorous Plants in the Pacific Northwest; Aphids on Drosera filiformis: Safe Insecticide Resources; LED Grow Lights: Intense for Low-Light Plants, Good for Nepenthes Supplement; Mealybugs on Drosera multifida: Systemic Treatment Required; Building a Microbog in a Chicago Kitchen Sink: Drainage, Hardy Species, and Winter Mulching; Incorporating Carnivorous Plants into an Indoor Topiary Art Project; Understanding Light Terms: Filtered vs. Partial Sun and Fluorescent Equivalents; Insecticide and Fungicide Choices for Nepenthes and Sarracenia; Using Aquarium Gravel in Carnivorous Plant Water Trays

Garden Articles

Deionized Water for Carnivorous Plants: Testing and Validation

Importing Carnivorous Plants from Taiwan to the US via Japan: Regulations and Realities

Overwintering Mixed Carnivorous Plants in Brooklyn, NY (Zone 6-7)

Understanding Plant Clones: Sarracenia Northwest's Nepenthes rafflesiana

Best Beginner Carnivorous Plants for Lexington, KY (Zone 6): Use the Online Selector

Wildfire Ash on Carnivorous Plants: Alkaline Hazard – Rinse Sideways Immediately

Carnivorous Plant Care Basics: Water, Humidity, Feeding, and Propagation Resources

Plants

Overwintering Sarracenia Indoors vs. Outdoors: Dealing with Wind

Using Sulfur Fungicide for Sarracenia Winter Dormancy (Cooler Method)

Mosquito Control in Carnivorous Plant Water Trays

Companion Plants for Nepenthes ampullaria Terrariums

Carnivorous Plants Native to Oregon

Summer Dormancy in Sarracenia flava and leucophylla in Houston

Why Fish Pond Water Kills Bog Carnivorous Plants