Planting Instructions for Cleome Flower Seeds

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Cleome Planting and Care Guide

Quick Facts About Cleome

Originally from South America, Cleome offers big, 4 - 6 inch spidery blooms that are showy and attract butterflies and hummingbirds. A common name is Spider Flower, and they are great for cutting and provide long-lasting color to indoor arrangements. The dark green foliage is narrow and stylish, too, making an attractive back drop for the big, fluffy blooms.

Planting Time

Cleome seeds can either be started directly outside once frost danger has passed, or to get a head start, the flower seeds can be started indoors 4 - 6 weeks prior to the end of frost season.

Planting Location

Cleome plants perform best in full sun and in well-draining, moderately moist soil. The plants are fairly heat and drought tolerant once established.

How to Plant Cleome

  • For indoor planting, start the flower seeds in starter trays
  • Press the seeds into the soil but do not cover
  • Keep the flower seeds consistently moist and warm
  • Move the seedlings to a bright, sunny window for growing
  • Pinch the seedlings back if they become too leggy
  • Harden off for 7 - 10 days prior to planting out
  • Or, work the garden soil to a depth of 6 inches
  • Add compost to improve the soil
  • Directly sow the seeds and press them into the soil
  • Keep the area moist continually
  • Thin to strongest plant 18 inches apart
  • The seedlings tend to be more vigorous when they are grown directly outdoors

Care And Maintenance

  • Irrigate regularly to help them establish
  • A slow-release fertilizer can be added at the time of transplanting
  • Deadhead spent blooms to encourage continued blooming
  • If the blooms are left, Cleome is known for self-sowing
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