Select from options: Continue writing the next sentence.

How to grow gaura
Sow seeds indoors.
Plan on starting the seeds indoors five to nine weeks before the date you intend to transfer the seedlings to your outdoor garden.
For annual varieties, sow the seeds five to six weeks before the anticipated last frost.

Select from: a). For flowering varieties like geraniums, sow the seeds eight to 12 weeks before the desired frost date. Each breed can choose to plant its seeds in the ground, rather than outside. b). For deciduous plants, you'll need to sow in late april (june through october) or later (june through march). For yams, seeds should be planted before the soil freezes. c). For ice-hardy varieties, sow them once a week in early spring. For winter-hardy varieties, sow seeds in late fall or early fall. d). 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).
Answer:
d).