Keep in mind when planting that Universal Citrus is thought of as half hardy, so it will require protection in frosts and low temperatures.
Sow at a depth of approx.
0.0 inches (0.0 cm) and aim for a distance of at least
8.97 inches (23.0 cm) between Pansy plants. Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Universal Citrus about 90 days before your last frost date.
As Universal Citrus is half hardy, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.