Seed Saving Basics

Which plants are worth saving seed from?

Save seed from open-pollinated varieties, which grow true to type when pollinated within the variety. Seed saved from hybrids usually does not produce plants like the parent, and may be weak or very different. Seed packets often say whether a variety is a hybrid. Some seed companies also hold plant variety protections or licenses that restrict propagation, so read the packet or catalog terms.

Start with the easiest crops. Beans, peas, lettuce and tomatoes largely pollinate themselves, which makes them the usual starting point for beginners.

Ask local seed savers or a seed library for varieties that perform well in your area. Seed adapted to your climate often gives the best results.

How do plants pollinate, and why does it matter?

Self-pollinating plants mostly fertilize their own flowers, so different varieties planted near each other seldom cross. Cross-pollinating plants, such as squash, corn, cucumbers and many in the cabbage and carrot families, rely on wind or insects to carry pollen between plants and between varieties of the same species. Cross-pollination between varieties gives seed that may not match either parent.

Know which group your crop belongs to. Your extension office or a seed-saving guide can tell you how far varieties should be separated, or whether to cage, bag or hand pollinate.

• Self-pollinating: beans, peas, lettuce, most tomatoes.
• Cross-pollinating: squash, corn, cucumbers, many root and cabbage crops.
• Use distance, timing or physical barriers to keep varieties apart.
• Grow only one variety of a species if you want pure seed.

How do you choose parent plants?

Select seed parents from the healthiest, most productive plants that show the traits you want, such as vigor, flavor, disease tolerance and good timing. Mark them early in the season, before harvest, so you do not eat them. Seed from sick plants can carry some diseases forward, so avoid saving seed from plants with obvious disease.

Save from several plants of the same variety instead of one, to keep the variety healthy and varied. A larger group of parent plants maintains vigor over generations.

Think about numbers. A few plants may be enough for self-pollinating crops, while cross-pollinating crops often need larger groups to keep the variety healthy. Your extension office or a seed-saving guide can suggest a number.

When is seed ready to harvest?

Timing depends on the crop. Dry seeds such as beans, peas and lettuce are harvested when pods or heads are dry. Fruit-borne seeds, such as tomatoes, squash and cucumbers, come from fully ripe fruit, and some need extra ripening past the eating stage. Biennials, such as carrots and onions, flower in their second year, so plan to overwinter them and to give them space.

Look up the crop in an extension seed-saving guide. Harvesting too early gives immature seed that will not store or sprout well.

How do you clean and dry seed?

Separate seed from pods, husks and pulp, and dry it thoroughly in a warm, shaded, airy place on a clean surface. Moist seed can mold and rot in storage, and seed dried in strong heat can be damaged. Keep each variety separate and labeled from the start.

Let seed dry fully before you put it in containers. Methods for wet-processed seed such as tomatoes differ from those for dry seed, so follow a guide for the crop.

How do you label and store seed?

Label every packet with the crop, variety, year saved and any notes. Store seed in a cool, dry, dark place in sealed containers, and keep it away from pests and moisture. Check your extension office's advice on storage methods and on how long each crop stays viable.

Test germination before you rely on old seed. A simple sprout test on a damp paper towel tells you how many seeds are alive.

What should you keep track of?

Record which plants you saved from, the planting and harvest dates, the weather, and how the offspring performed. Over several seasons these notes show whether selection is improving your crop.

Be careful with seed sharing and sales. Rules about selling or distributing seed are set by state and sometimes local agencies, so ask your state department of agriculture before you sell any.

Plan a small first project, such as one bean variety and one tomato variety, and save seed from them before taking on harder crops. Join a local seed swap or ask your Master Gardener program about one, since experienced savers know which varieties do well in your area and can help you avoid common mistakes.

Last reviewed: November 12, 2026. Written by the Homestead & Small Farm Editorial Team. See our editorial policy.