Poinsettias love bright sunlight, but not cold, so move the plant away from windows at night as the glass gets cold. They don't like overwatering.

Poinsettias can be re-flowered the following Christmas, but unless a yearlong schedule of care is observed, the results usually are not good. For such a schedule, continue normal watering of the soil until April or May and then allow it to dry gradually. Do not let it get so dry at any time that the stems shrivel. Best to keep in a light but cool place.

Poinsettias_01.JPG     Poinsettias_02.JPG
【学名:Euphorbia pulcherrima(ユーフォルビア プルケリマ)】

In mid-May, if the plant has got too big cut back some of the stems to form a good shape. Can also put the plant in a bigger pot if needed. After new growth appears, maybe a good idea to use some fertiliser.

In June, move it outdoors, and place it in a lightly shaded location. Continue watering and fertilizing the plant while it is outdoors. Then, in late August, cut or pinch the new stems back, allowing three or four leaves to remain on each shoot. Bring the plant indoors and again place it in a sunny place.


Poinsettias are short-day plants, which means they flower about 10 weeks after the daylight shortens to about 12 hours or less. Usually at least 15 hours of complete darkness every day is best (it has to be somewhere that a light won't be accidentally turned on or even moonlight won't reach!) Therefore, to have the plant in full flower by Christmas, keep it in complete darkness between 5 p.m. and 8 a.m. from early October for 8 weeks or 10 weeks. During this period, any kind of light exposure between 5 p.m. and 8 a.m. will delay flowering. Remember to put the plant near a sunny window in the daytime. Continue fertilizing the plant until mid-December.

This article is based on someone living in a cool area (like Nagano) but moving the plant in & out all depends on where you live, the temperature and climate. But you have to allow enough time to shorten the day length where ever you are!





ポインセチアは'ショートデイ プランツ(短日植物=短い日の明かり、長い暗闇で特徴を出す植物)'です。

この記事は基本的に涼しいエリア(長野県のような)に住んでいる方向けですが、植物を屋内、屋外へ動かすのは全てあなたがどこに住んでいるか、気温や気候にもよります。 しかし、どれだけ十分な時間、日の当たる長さを短くするかはどこにいてもあなた次第です。(調整ができるでしょう)






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