[header] How to grow lavender from seed [title] Start the seeds 6 to 12 weeks before warm weather hits. [step] Lavender seeds can take a while to germinate and should be started early indoors so that they have plenty of time to grow into mature plants during the warm growing season. [title] Put the seeds through a process called " cold stratifying. 
[step] " in this process, seeds should be placed in a sealable plastic bag filled with moist soil. Use a commercial soil specially formulated for starting seeds.