The garden annual Cleome (spinosa), also known as spider or wild Rocky Mountain bee (Cleome serrulata) plant is a tall, spiky stalk with intricate and unusual blossoms at the top. The large flower heads are pink, white, rose, violet and lavender. You can easily harvest seeds after the plant has matured, blossomed and gone to seed. Remove the thin, elongated pods when they start to split open and save the cleaned seeds in protective containers. You can plant cleome seeds from the previous year and enjoy the colorful blooms over and over again.
Remove the seeds from the previous year from the sealed bag, bottle or envelope where you have stored them in a dry place. Check to be sure that none of the seeds have been exposed to moisture.
Dig up the area of the flower bed or border with a spade until you have loosened the soil at a depth of 18 to 20 inches. Remove any stones that are in the cleome flower bed. Dump 1 or 2 qt. of compost onto the soil and mix it in with the spade.
Turn the soil over with the spade several times within the area where the cleome seeds will be planted. Rake the area until it is smooth.
Scatter the cleome seeds over the soil by holding several in your hand and letting them fall freely as you shake your fingers. Plant seeds 18 to 24 inches apart to give them a good root span.
Hold fine soil in your hands and gently scatter it over the area where you have placed the seeds. Add no more than 1/4 inch of cover soil on top of the seeds.