Hyacinth

full sun (6 or more hours of sun hitting the leaves per day. South-facing window, no obstructions. Under grow lights, keep them 4-8 inches away for 12-14 hours) to partial shade outdoors; 6+ hours of bright light daily for best blooming. Indoors, place in the brightest spot available. Cool temperatures prolong the flowering period significantly.

average humidity (normal household levels, 30-50%, work perfectly fine) is fine. Hyacinths are cool-season plants and do not need elevated humidity.

Rich, organically amended, well-draining soil (equal parts potting soil, perlite, and orchid bark. The goal is soil that lets water flow through without staying soggy). pH 6.0-7.0. Bulbs will rot in waterlogged conditions; raised beds or sandy amendments help in heavier soils.

Bulb rot in wet or poorly drained soil is the primary issue. Soft rot bacteria can destroy stored bulbs. Contact dermatitis from bulb handling is common -- wear gloves when planting. After the first year, subsequent blooms in the ground are typically smaller and more spaced on the stem.