Garden Cosmos

Name: Garden Cosmos
Brand: Outdoor Dream Builders

Cosmos bipinnatus

Airy, feathery foliage topped with cheerful daisy blooms in shades of white and pink that bees and butterflies adore.

A frost-tender warm-season annual in USDA zones 9-11; sow after the last low-desert frost for summer-to-fall bloom, and it reliably reseeds in mild winters.

AMWUA Notes

A fast, easy warm-season annual that delivers big pollinator-friendly color from a single spring sowing.

Care Guide

💧Watering

Water weekly while growing and blooming; cosmos is fairly drought tolerant but flowers best with steady moisture and dislikes soggy soil.

✂️Pruning

Deadhead spent daisies regularly to prolong bloom and keep the plant from going to seed too soon; pinch young tips once to encourage bushier plants.

🌱Fertilizing

Avoid rich soil and nitrogen fertilizer, which produce lush foliage and few flowers; lean soil yields the best bloom.

🛡️Pests

Occasional aphids on new growth; otherwise clean and easy.

☀️Seasonal Notes

A warm-season annual in the low desert; sow after frost for a summer-fall show, and let it reseed to return the following year.

Soil, Feeding & Propagation

🪨Soil

Lean, well-drained soils; tolerates poor ground; rich soil yields foliage at the expense of flowers.

💧Drainage

Needs well-drained soil.

🌱Nutrient Needs

None — thrives in lean desert soil without fertilizer.

🌰Propagation

Seed; direct-sow after frost (warm-season) as it resents transplanting, and it reseeds to return.

📐Spacing

1–1.5 ft

🌳Roots & Placement

Minimal; a shallow-rooted annual that resents transplanting and reseeds gently.

Placement Tips

•Mass at the back or middle of a bed where the tall, airy stems create a soft, colorful haze.
•Sow directly in place — cosmos resents transplanting and germinates readily from seed.
•Let a few flowers set seed to reseed the patch for next season.
•Full sun; a great cut flower and pollinator draw near a vegetable or butterfly garden.