Viola seeds can be a bit tricky to germinate, but with the right care, you can succeed. Here's how to do it:
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Pre-chill (stratification): Viola seeds benefit from a cold period before planting. Place the seeds in the refrigerator for 1-2 weeks before sowing.
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Sowing Depth: Plant the seeds shallowly, just barely covering them with soil, as they need light to germinate.
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Soil: Use a well-draining seed-starting mix. Ensure the soil is kept moist but not soggy.
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Temperature: Keep the soil at a cool temperature of around 15°C (59°F) for optimal germination.
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Light: Viola seeds need light to germinate, so don't cover them with too much soil. Place them in a bright spot, but avoid direct sunlight.
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Germination Time: Viola seeds can take 10-14 days to germinate, though it may take longer if conditions aren't ideal.
Once they sprout, ensure they have good air circulation and are gradually acclimated to outdoor conditions before planting them out.