Buy Flowers › Euphorbia donii - 4" Pot Euphorbia donii - 4" Pot $6.50 Lovely spurge with red stems and bright chartreuse flowers in summer, 30' tall, usually hardy in zone 5 especially in gravel/good drainage, reseeds Add To Cart Added! Lovely spurge with red stems and bright chartreuse flowers in summer, 30' tall, usually hardy in zone 5 especially in gravel/good drainage, reseeds