This seed germination guide covers the four conditions every seed needs to wake up from dormancy. Get them right, and germination rates climb dramatically. Get them wrong, and even premium seed will sit in the soil doing nothing.
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The Four Things Every Seed Needs
Water softens the seed coat and activates enzymes inside. Warmth — most seeds germinate best between 18–24°C (65–75°F), though some, like wasabi, prefer cooler conditions. Oxygen reaches the embryo through the soil, which is why compacted or waterlogged soil blocks germination even with enough moisture. Light or darkness — some seeds need light to germinate and shouldn’t be buried, while others need total darkness.
Common Germination Mistakes
Overwatering: saturated soil pushes out oxygen and can rot the seed before it sprouts
Planting too deep: a good rule of thumb is depth roughly 2–3 times the seed’s diameter
Inconsistent temperature: fluctuating warmth confuses the germination trigger, especially indoors near drafty windows
Old or improperly stored seed: viability drops over time, especially in warm or humid storage
Speeding Things Up: Pre-Treatment Methods
Some seeds with tough coats — like many tree and shrub seeds — germinate faster after soaking in water for 12–24 hours, or after a period of cold stratification that mimics winter. Check the specific product listing for recommended pre-treatment.
Frequently Asked Questions
Why won’t my seeds germinate?
The most common causes are incorrect watering, wrong temperature, planting too deep, or old seed stock — work through each factor systematically.
How long does germination usually take?
Most vegetable and flower seeds show visible sprouting within 5–21 days depending on species; some tree and shrub seeds take longer.
Does soaking seeds before planting help?
Yes, for many hard-coated seeds, soaking softens the seed coat and speeds up germination significantly.
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