These quick-germinating seeds grow easily in shallow containers with well-drained potting soil and a moderately sunlit window.
Sprouts are the quickest, easiest green you can seed indoors. They don’t need as much light as most vegetables and barely require any tending.
The difference between sprouts and microgreens is that sprouts are the youngest seedlings, with only cotyledons.
Mint, chives, lemon balm, and scallions are just a few of the herbs you can grow indoors almost year-round. The keys to successful indoor herbs are well-drained soil mix and modest watering.
These onion relatives grow quite slowly and benefit from indoor sowing in mid-winter. These are best grown in open flats, making them easy to cut back in the spring. Prepare a shallow open tray with a well-drained seed starting mix.
Many storage onions and sweet onions take over 100 days to mature, which means indoor sowing is the perfect head start for areas with short growing seasons. You can start onions 8-10 weeks before the last frost date.
It’s best to seed celeriac inside about 10-12 weeks before you plan to transplant outdoors. For most zones, this falls in mid-winter, around January through March.
Seed celery indoors in late February or early March, approximately 10-12 weeks before your transplant date. Never let young celery plants to be exposed to temperatures below 55°F.
Stevia seeds are best sown indoors about 6-10 weeks before your estimated frost date. The huge range depends on your climate because stevia needs to stay indoors until temperatures are reliably above 45°F.