How to Start Swiss Chard From Seed
Swiss chard is an easy, productive leafy vegetable that can be started indoors or sown directly. Its colorful stems and leaves tolerate light frost once plants are established.
Start indoors or direct sow?
Direct sowing is simple, but indoor starts can provide an earlier harvest in short-season gardens. Chard tolerates transplanting well when moved while young.
When to start Swiss Chard seeds
Start indoors 3 to 4 weeks before the average last spring frost, or direct sow 2 to 3 weeks before it. Continue direct sowing into early summer for additional harvests.
How to sow the seeds
Sow the clustered seeds 1/2 inch deep in sterile seed-starting mix or prepared garden soil. For indoor starts, use individual cells about 1 1/2 to 2 inches wide so roots are not crowded. Keep containers in bright light after emergence.
Germination
Seeds commonly germinate in 5 to 10 days. Soil temperatures of about 60 to 75 F are ideal, though chard can germinate in cooler soil. Maintain even moisture without saturating the mix.
Seedling care
Provide full sun to partial shade, with strong supplemental light for indoor seedlings. Water when the surface begins to dry, and use airflow and clean containers to limit damping off. Thin direct-sown seedlings to 6 to 12 inches apart, depending on the variety and desired size.
Transplanting & hardening off
Harden off indoor seedlings for 7 to 10 days before planting outdoors. Transplant after seedlings have two or more true leaves, spacing them 6 to 12 inches apart in moist, well-drained soil. Water them in thoroughly after planting.
Tips
Each chard seed cluster can produce more than one seedling, so thinning is important. Harvest outer leaves first to keep plants producing.
General seed-starting guidance for US home gardens; timing depends on your local frost dates and variety. Page updated Aug 4, 2026.