Doris, cilantro is a cool season herb--easily started from seed. Here in Texas we grow cilantro (planted in March) outside in pots or in the ground, and by mid-June it is finished. We start it again in late September, and it grows until the first freeze.
I've never tried growing cilantro inside, but I'd imagine a cooler room, with sunlight through a window for about half the day, and if the plant starts to look poorly, move it.
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