Seed Germination Test: How to Check Old Seeds Before Planting

Every gardener has a "stash" of seeds from previous years. But over time, germination energy fades. To avoid waiting two weeks by an empty garden bed, it’s better to perform a quick home test. This is especially relevant now as we plan repeat sowings of summer greens like arugula.

How Long to Wait for the First Sprouts?

Different crops wake up at different speeds. Use this table as a reference for your test:

Crop	Germination Period (days)
Tomatoes	6 – 10
Cucumbers & Zucchini	3 – 7
Peppers	10 – 15
Lettuce & Spinach	2 – 5
Beans & Peas	5 – 10
Carrots & Dill	12 – 18
Eggplant	8 – 12
Cabbage	4 – 7

3 Steps to Conduct the Test

1. Preparation: Take 10 seeds from a packet, place them on a damp paper towel, and cover with another damp towel.
2. Environment: Place the towel in a plastic bag to lock in moisture and keep it in a warm spot (22-25°C).
3. Result: After the days listed in the table, count the sprouts. If 7-10 sprouted, the seeds are excellent. If less than 5, consider buying fresh or sowing twice as thick.

AgroPlanner Tip: For very old seeds, add a drop of growth stimulant or aloe vera juice to the soaking water to help "awaken" the embryos. Use our planner to plan planting and know exactly which beds are ready for verified seeds.