Knowing when the last average frost date for your area is important when planning on when to sow seeds indoors. Sown too soon, plants get leggy and may outgrow their containers before transplanting time. Sown too late, you may lose out on long growing crops maturing before fall frost. Here is a chart showing times to sow garden seeds indoors for later transplanting outside.
Spring sowing guide for vegetables and herbs
10 - 12 weeks before average last frost
8 -10 weeks before average last frost
6 - 8 weeks before average last frost
4 - 6 weeks before average last frost
2 - 4 weeks before average last frost
rat tail radish
New Zealand spinach
Please notice some crops are not included, such as carrots. Root crops like carrots, potatoes, and turnips do better when sown outside rather than started indoors.