Native to southern Africa, Euphorbia enopla is a species of flowering succulent sometimes grown as a houseplant or outdoor ornamental in USDA zones 9 to 11. The thick, spiny stems grow to a maximum height of 24 inches with a branching growth habit resembling a candelabra. In midwinter, Euphorbia enopla sends up several small yellow flowers from the tip of each stem. Like most succulents, Euphorbia enopla propagates reliably from cuttings taken during the active growing season, but it also grows well from seed if the seeds are sowed immediately after harvest.
- Skill level:
- Moderately Easy
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Things you need
- Latex gloves
- Pruning shears
- 5-inch plastic pot
- Coarse sand
- Potting soil
- Propagation heat mat
Put on a pair of latex gloves before cutting the Euphorbia enopla plant since it bleeds white sap that will cause skin irritation and discomfort if touched.
Cut a 4- to 6-inch-long section from the tip of a healthy Euphorbia enopla stem in early summer. Make the cut with pruning shears. Handle the cutting with a pair of tongs to protect your hands from the sharp spines.
Run water from a garden hose over the end of the cutting to staunch the flow of sap. Place the cutting in a dry, shady location for seven to 10 days to allow the cut to callus over.
Fill a 5-inch plastic pot to the halfway point with a mixture of equal parts perlite and coarse sand. Set the Euphorbia enopla cutting inside the pot with the cut-end resting on the surface of the perlite and sand mixture. Fill the pot around the cutting with more of the perlite and sand mixture until the cutting is halfway buried. Water it with 1/2 cup of water.
Place the potted Euphorbia enopla cutting near a well-lit window or outside in a protected spot when temperatures stay reliably above 10 degrees Celsius at night and 21.1 degrees Celsius during the day. Check for root growth after 20 days.
Harvest seeds from a healthy Euphorbia enopla plant in late summer when the flowers have faded and formed into seed heads. Snip the seeds loose using pruning shears and remove the seeds from their husks. Set the seeds aside.
Combine equal parts perlite, coarse sand and potting soil to create a good rooting mix for Euphorbia enopla seeds. Fill several 5-inch plastic pots with the mixture and saturate it with water. Drain it for five minutes or so before sowing the seeds.
Scatter the Euphorbia enopla seeds over the surface of the soil and press them slightly with the flat of your thumb to anchor them. Scatter a thin layer of sand over the top to keep them from drying out or accidentally blowing away.
Place the potted Euphorbia enopla seeds on a propagation heat mat set to 23.9 degrees Celsius near a source of bright light. Drizzle 3 or 4 tbsp of water across the soil every other day to keep the soil mixture moist but not saturated.
Check for signs of germination after 20 days. Gradually lower the temperature of the propagation heat mat by increments of -15 degrees C daily until the temperature matches the ambient air temperature. Turn off the mat.
Keep the potted Euphorbia enopla seedlings indoors until the following spring. Move them outside to a sheltered spot once all danger of frost has passed. Repot them into larger pots or plant them in a permanent outdoor bed once they establish a good root system and begin to put on growth.
Tips and warnings
- Wash your hands thoroughly after working with euphorbia plants.
- Seek medical attention if the sap from the euphorbia plant gets into your eyes or mouth.
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