Helianthemum bicknellii

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Helianthemum Bicknellii 1 Helianthemum Bicknellii Helianthemum Bicknellii 3 Helianthemum Bicknellii 2
Helianthemum Bicknellii 1 Helianthemum Bicknellii Helianthemum Bicknellii 3 Helianthemum Bicknellii 2

Helianthemum bicknellii

Common Name: Hoary Frostweed

Hoary Frostweed is a short-lived perennial or biennial that grows 1 to 2 feet tall. It is found in sandy prairies, oak savannas, and disturbed soils. This plant has bright yellow flowers that bloom in summer, and its name comes from the unique ice formations that can develop at its base in late fall. It is an excellent choice for dry, sandy gardens and prairie restorations, where it supports native pollinators.

Characteristics

Type Forb
Sun Full Sun, Partial Sun
Soil Sand/Gravel
Moisture Dry
Average Max Height (inches) 18
Suggested Plant Spacing (inches) 12
Bloom month(s) June, July
Bloom Color or Type Yellow
Dominance Low

Range Maps

Sowing Information

For most homeowners, the recommended method is to hand-broadcast seed at a minimum rate of 16–64 PLS (Pure Live Seed) ounces per acre. To ensure even coverage, broadcast the seed in perpendicular passes across the site. Grass seed should be broadcast first and lightly raked into the soil. Afterward, apply a light mulch layer using clean, seed-free straw or, preferably, our native Little Bluestem straw, available at our retail garden centers. Once mulching is complete, broadcast native wildflower seed over the area without raking it in. A good rainfall or thorough watering will provide sufficient soil contact for successful germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.