A seed contains a young plant and stored material that can support its early growth. Water, oxygen and a suitable temperature help it begin germinating. Too little water can leave it waiting. Too much water can fill air spaces and limit oxygen. Different kinds of seed have different requirements, including whether light helps them start. In the model, watch the first root emerge before the shoot and leaves. The progress control represents development stages, not a count of real days.
Plants, animals and ecosystems · Discover & try
What does a seed need before it starts growing?
Reading level 1 of 5 · EarlyChange
Word help
germination
The resumption of growth from a seed.
viable
Containing living tissue capable of developing under suitable conditions.
Watch · Try · Explain
See how it works
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One imagined viable, non-dormant seed; stages have no real-time or species-universal calibration.
What to look for
- Stored reserves support early growth
- Moist is different from waterlogged
- Oxygen and temperature also matter
Explain what you noticed
An otherwise suitable seed is placed in waterlogged material with little oxygen. Why might germination be impaired?
Keep this idea: A viable seed needs suitable conditions; unlimited water is not the goal.
Follow the sources
- Penn State Extension — Seed and Seedling Biology
- U.S. Forest Service — Woody Plant Seed Manual: Seed Biology
Source material checked 2026-10-29. Explanations and activities by Nepedia. Source links do not imply endorsement.
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