If growers are having trouble with flower bud opening especially on doubled-flowered types, one or two 250 ppm sprays of gibberellin 3 about two to three weeks before the scheduled harvest can promote opening. Some suggest that it should be harvested when about 50% of the visible flowers are open. Slow release fertilizers can reduce leaf yellowing under interior conditions.
Chill sensitive, store above 55 degrees F.
The variety ‘Atrocaeruleum’ has dark lavender flowers with golden-yellow stamens (where the pollen forms).
From the Greek “ex” (out) and “agere” (to drive), referring to the purgative (purging) properties of members of this genus.
Will generally do well in light levels at least bright enough to read a newspaper in comfort but more light would be better.
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