Bok Choy Seeds,
Yellow Heart Winter

Yellow Heart Winter choy is ideally planted in late summer or early fall for a winter harvest. In regions with mild winters, it can be grown through the cold months. For spring planting, wait until the hard cold has broken and the soil is steadily above 50 F, then harvest before summer heat arrives. The plant's cold tolerance makes it an excellent choice for extending the growing season into the cooler months.

Sow seeds directly into the garden 1/4 inch deep and space them 6-8 inches apart, with rows spaced 12-18 inches apart. Seeds can also be started indoors 4-6 weeks before the last expected frost date and transplanted outside when the soil is workable and temperatures are consistently cool. Ensure the soil is well-prepared with compost or other organic matter to support healthy growth.

Yellow Heart Winter choy prefers full sun but will tolerate partial shade, particularly in warmer climates. Maintain even soil moisture to prevent the plant from becoming stressed, which can lead to bolting. Mulching around the plants helps retain moisture and control weeds. Regular feeding with a balanced organic fertilizer or additional compost will encourage robust growth and high yields.

Bok choy is an annual, completing its life cycle in one year. To avoid selecting bolt-prone plants, don't save seeds from prematurely bolted ones. Let plants mature fully, harvest the dried pods, crumble the small round seeds into a jar or bag, then seal and store the seeds in a cool, dark, dry place. Bok choy cross-pollinates with other rapa species but not with different species of Brassica, so it's safe to grow it next to mustard greens (Brassica juncea), for example. To ensure seed purity, isolate your bok choy from other blooming B. rapa by about a half mile or use caging techniques. Allow your healthiest plants to flower for a strong, diverse seed pool.