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Hi there. Does anyone have a recommendation for why my indoor geraniums might not be blooming? They got tons of sun and have an appropriate size pot. I let the soil dry out between waterings and the leaves are healthy. just no blooms. what can i do? thanks for any tips!
Many pelargoniums are day length dependant for bloom. They'll spot blooms during the winter, but they won't resume active blooming until the daylight period is long enough for them to do so. Artificial lighting could help, but as a winter windowsill flower, they just aren't going to perform the same as they will in spring and into the summer.
By geranium do you mean cranesbills, which are botanically Geraniums, or do you mean pelargoniums, which are commonly called geraniums, like zonal, ivy-leaf, Martha Washington and scented-leaf. Zonals and ivy-leaf will bloom nearly year-round given enough light indoors. Martha Washington (regals) and scented-leaf need cool winter night temperatures for their spring bloom.