Harvesting Cleome Seeds for Next Season’s Planting

Overview

Cleome hassleriana (spider flower, cat whiskers) blooms non‑stop midsummer to frost. Prolific self‑sower, but seeds scatter randomly. Harvest in late summer/fall to choose planting spots.

Step 1: Watch Pods

Slim, bright green, 2‑in. “whisker” pods develop after flowering. Mature when tan and dry.

Step 2: Pick on a Dry, Sunny Day

Reduces mildew risk. Test a pod—roll between fingers; mature pods release hundreds of tiny black seeds.

Step 3: Extract Indoors

Roll pods over a bowl to collect seeds.

Step 4: Jar & Label

Clean glass jar, tight lid, label with variety and date.

Step 5: Refrigerate

Store in fridge until planting next year.

Step 6: Use Spent Plants as Mulch

Lay whole plants where you want volunteers next spring—they’ll reseed generously.