How to sow Pinguicula seeds
Winter-growing Pinguicula
Butterwort seeds with overwintering buds are black/brown and tiny. It’s crucial not to sow the seeds too closely together, as seedlings need space to grow. A folded piece of paper shaped into a small funnel can be a handy tool for precise sowing. Below is a guide on how to sow Pinguicula seeds and provide the right conditions for their growth:
Light conditions: Diffused light. Avoid overheating seeds under direct sunlight.
Temperature: Normal room temperature. Seeds must undergo cold stratification before sowing. The easiest way is to sow the seeds on moist substrate in a pot, seal it in a bag, and place it in the refrigerator for 4–5 weeks. Alternatively, seeds can be sown outdoors during winter for natural stratification.
Substrate: A mix of peat with silica sand or perlite in a 2:1 ratio. Seeds are sown on the surface and not covered.
Air humidity: Seeds germinate best at 100% humidity. Cover the pot with transparent foil to maintain moisture while allowing light through. Gradually acclimate seedlings to the humidity suitable for mature plants.