euphorbia horrida is native to south africa and commonly known as african milk barrel. it’s a somewhat variable plant with many varieties and forms. there are also cultivars with red spines and flowers available.
euphorbia horrida – african milk barrel care
this description is based on my experiences with euphorbia horrida var. striata. the cultivation of other forms or varieties can be different.
the african milk barrel does best, if grown on a bright and sunny place throughout the year. a light shaded location will be tolerated. during summer it can be placed in the garden. but make sure that rainwater can easily flow out of the pot. because sitting in water will cause rot.
it grows well in a good drained mineral potting substrate. i’m using a mix of potting soil, seramis (lay granulate), pumice and coarse sand (1:1:1:1).
from spring to fall euphorbia horrida var. striata can be deep watered. what’s flowing out of the pot’s hole must be removed after a few minutes. before adding water next allow to dry.
in spring and summer a half diluted cactus fertilizer can be given monthly. during fall/winter there is no need to feed.
euphorbia horrida var. striata can be cultivated at room temperature the year round and needs a winter minimum of 10 °C/50 °f. the colder it is placed during this season, the less water is needed.
euphorbia horrida propagation
euphorbia horrida can be grown from seeds or cuttings.