For perennial varieties, sow the seeds eight to nine weeks before the anticipated last frost. Make sure that the spot you choose indoors can maintain a temperature between 70 and 75 degrees fahrenheit (21 and 24 degrees celsius).
[header] How to grow gaura [title] Sow seeds indoors. [step] Plan on starting the seeds indoors five to nine weeks before the date you intend to transfer the seedlings to your outdoor garden. [substeps] For annual varieties, sow the seeds five to six weeks before the anticipated last frost.