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How do you grow giant viper's-bugloss?
The giant viper's-bugloss can be grown from seed, and this can be sown directly outside a couple of weeks after the winter frost. If growing inside to begin with, plan the sowing to be around six weeks before planting out.
Mix some organic compost to your garden soil to improve drainage, because the giant viper's-bugloss is sensitive to damp soil. If planting in containers, consider a pebble layer, preferably limestone. The seed doesn't have to be planted deep - lightly cover the seed with a soil layer and press down gently. Keep the soil moist throughout the germination process. The optimal temperature range for germination is 18 to 21 ℃. Space the plants at 25 to 61 cm apart and use a large pot if planting a taller-growing variety.
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