WOW Stands For Water, Oxygen, And Warmth. These Are The Three Fundamental Environmental Conditions Required For A Seed To Break Dormancy And Begin The Germination Process.
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Unless we understand the seeds requirements, and supply them, our seeds will fail to germinate .. or give poor germination rates. This article is about how you should WOW Your Seeds.
The WOW Factors
Seeds needs warmth, oxygen and water. That might sound obvious but I see so many seeds failing, and seed companies being blamed, when the reality is that the gardener has failed to provide for the basis needs of the seeds. I explain more below. You might also read Why Seeds Fail.
Water (Moisture)
Water is the primary catalyst for germination. Seeds are naturally dehydrated to remain dormant for long periods. Some seeds have been viable thousands for years. For example the Judaean Date was declared extinct until some seed was found in a tomb at Masada. The seed was verified as being at least 2000 years old and still germinated when sown.
* Imbibition: The seed absorbs water, causing it to swell and rupture the seed coat (testa).
* Metabolism: Moisture activates the enzymes that convert stored food (starch) into energy (sugar) for the developing embryo.
* Caution: Consistent moisture is vital, but waterlogging can lead to fungal issues like “damping off.”
Oxygen
While many believe seeds need “air,” it is specifically oxygen that allows them to breathe.
* Respiration: Germination is an energy-intensive process. Seeds require oxygen to perform aerobic respiration, which powers their initial growth before they can photosynthesise.
* Soil Structure: If the soil is too compacted or oversaturated with water, oxygen is displaced, causing the seed to suffocate and rot.
Warmth (Temperature)
Every plant species has a specific temperature range—the optimum germination temperature—at which it will sprout most effectively.
* Enzyme Activity: Warmth regulates the speed of chemical reactions within the seed.
* Variability: Hardy vegetables (e.g., broad beans) may germinate at 5C, whereas Mediterranean varieties (e.g., chillies or tomatoes) often require a consistent 21 to 27C.
Why Light Isn’t in the Initial “WOW”
It is a common misconception that all seeds need light to start growing. In reality:
* Most seeds prefer darkness and are sown at a depth roughly two to three times their width.
* Specific exceptions (such as lettuce or celery) are “photoblastic” and require light to trigger germination; these are usually sown on the soil surface.
Research Sources
These principles are grounded in plant physiology and are standard teaching in Royal Horticultural Society (RHS) Level 2 qualifications and botanical studies.
