Germination of
Rubus ulmifolius
Thornless Bramble, Smooth Blackberry, Rubus fruticosus 'Thornless', Thornless Blackberry
Stratify seeds in refrigerator for 10-12 weeks before planting. - Sow seeds ¼ inch deep in well-draining soil. - Maintain a temperature of 70-75°F (21-24°C). - Keep soil consistently moist. - Transplant seedlings outdoors after last frost.
Some of plants may have very have specific germination requirements that may not be covered in these general instructions.
Many seeds require pre-treatment before sowing which we try to list here when we can, but this information may not be present here. Germination times and germination temperatures are to be a guide only. Many factors can DRASTICALLY affect this.
It's always a good idea to research the specific germination requirements from multiple sources for each plant before attempting to grow them from seed.