Square-stalked Willowherb (Epilobium Tetragonum) is a perennial herb in the Onagraceae family with easy care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 5-9. This plant is safe for cats and dogs.
Epilobium tetragonum is a perennial herbaceous plant known for its distinctive square stems and pink flowers.

Square-stalked Willowherb
Epilobium Tetragonum
Epilobium tetragonum is a perennial herbaceous plant known for its distinctive square stems and pink flowers.
Quick Facts
Safety
Growing Conditions
Care Calendar
Monthly care tasks for Square-stalked Willowherb
Expert Care Tips
Pro tips from botanists and plant experts
Watering Tip
Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.
Humidity Trick
Group plants together to create...
Growth Hack
Rotate your plant every...
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