the poinsettia (euphorbia pulcherrima) has a lot of names, here in germany it’s very famous under the name christmas star. sometimes it’s called mexican flame leaf or winter rose. there are cultivars with white, yellow, green or multicoloured bracts available.
care
poinsettias like it bright with indirect sunlight. if they should bloom for the holidays they need a six to eight week of darkness for approx. 12 hours every day, starting in september. during the summer you can give them a place without afternoon sun in the garden or on the balcony.
they can be grown in a regular potting soil or a mix with a part of sand. keep the soil moist but not wet and water when it feels dry. overwatering can cause irreversible root rot.
a water soluble fertilizer can be given monthly in half of the manufacturers indicated concentration.
poinsettias can be cultivated at room temperature throughout the year. the minimum winter temperatur is about 14 °c (57 °f).
stems could be cut back if they become to big.
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propagation
euphorbia pulcherrima can be propagated by cuttings.