Viola odorata, commonly known as sweet violet, is a fragrant perennial herb native to Europe, Western Asia, and northwest Africa. Seeds require extended cold stratification of 4-6 weeks to break dormancy and germinate successfully. Germination is often erratic and slow, typically occurring 3-8 weeks after the cold period ends.
Before sowing
Cold stratification is required to break dormancy. Mix seeds with damp sand or vermiculite, seal in plastic bag, and refrigerate at 35-40°F for 4-6 weeks. Seeds must not be frozen or kept in excessively wet conditions.
Sowing
What to expect
Tips
Sow seeds shallowly (1/8 inch deep) in darkness. After cold stratification, move seedlings to cool conditions (65-75°F) for germination. Keep soil consistently moist but never waterlogged or soggy. Germination begins in refrigerator but accelerates when moved to warmer conditions. Do not discard moldy seeds—they may still germinate. Consider winter sowing outdoors as natural stratification alternative.
Sources: Select Seeds, Outside Pride, Swallowtail Garden Seeds, PFAF Plant Database, Plant Propagation Resources
