User Question: What causes seedlings not to germinate?
Even experienced gardeners encounter this frustrating issue. Let's break down the primary reasons based on years of hands-on growing expertise.
The most common culprit is seed quality. Old seeds lose viability quickly—some last only months, while rare exceptions endure decades. Generally, seeds over 2-3 years old are unreliable. Always check the expiration date on packets for best results.
Even fresh seeds can lack germination power due to genetic malformations or, in some cases, genetically modified plants (PGMs) where germination isn't viable.
Sometimes seedlings sprout but succumb to external factors: extreme weather (excess water, drought, cold), fungal damping off, slugs, or other pests.
Monitor sowing closely, like watching milk on the stove. Sow generously to ensure enough plants—90%+ success often leads to surplus, which brings its own challenges...
Sowing in a seed tray
