Sow at a depth of approx.
0.04 inches (0.1 cm) and aim for a distance of at least
11.7 inches (30.0 cm) between Cape daisy plants. Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Arusha about 56 days before your last frost date.
As Arusha is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.