- You Will Get 200 Seeds Of Stinging Nettle Urtica Dioica (Common, California, Bull Nettle) Flower Seeds. - Description: - Name: Stinging Nettle. - Other Common Names: Common Nettle / Tread Softly / Bull Nettle / Stinger / Nettle / California Nettle / Tall Nettle / Slender Nettle. - Scientific Name: Urtica Dioica. - Color: White. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 36 - 48". - Plant Spacing: 15 - 18". - Bloom Time: All Summer. - Hardiness Zone: 2 – 10. - Light Requirements: Sun. - Soil & Water Preferences: Average – Dry. - Other: The Stinging Nettle Is Covered In Small Stinging Hairs That Can Cause Itching & Pain. Some People Can Have An Allergic Reaction To Them. That Having Been Said, They Do Make A Great ‘Protective’ Plant! Grow Them Underneath Windows Or Anywhere You Want To Make Sure Intruders Don’t Go.