Sweet Annie (Artemisia annua)

The planting instructions on my seed packet for Sweet Annie didn't print properly, so though I know that I'm to mix the seeds with wet sand and freeze, I don't know for how long... I know I once did just throw some in without freezing and it grew, but I didn't get a very high germination rate.

We do not find that sweet wormwood (commonly known as sweet annie) needs a freezing treatment. We recommend sowing in the normal way in a seed box or flat with a standard sowing medium. It will also grow when sown directly in the garden in spring.
The seed is very small (11,000 seeds per gram) which means that the germination can easily be compromised by planting to deeply, inadequate watering, or competition from weeds. Normal germination rates are 40-50% when sown in the garden.