Calylophus serrulatus, also known as Yellow Sundrop, is a perennial plant that grows 1 to 2 feet tall. It features lance-shaped leaves and produces showy yellow flowers from June to August. This species is typically found in prairies, rock outcrops, bluffs or dunes preferring dry, sandy or rocky soils and full sun. Yellow Sundrop is valued for its bright blooms and drought tolerance, making it suitable for xeriscaping and native plant gardens.
Characteristics
Product Form
Plant
Type
Forb
Sun
Full Sun, Partial Sun
Soil
Sand/Gravel, Calcareous
Moisture
Dry, Mesic
Average Max Height (inches)
18
Suggested Plant Spacing (inches)
12
Bloom month(s)
June, July, August
Bloom Color or Type
Yellow
Dominance
Medium
Range Maps
Sowing Information
Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve 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.
