Buy these prepared corms for best results. Freesias are usually potted up in the autumn. No 2 and soilless compost. Leave the pots in a cold frame until October, then place them in a cool greenhouse for winter. When buds form apply a general purpose liquid fertiliser once a fortnight.
Freesias also perform well outdoors, as long as the soil is really well-drained.
Although they like good light, avoid sites where they will be too hot and baked during the summer. I planted corms in October last year and was rewarded by a brilliant display the following late spring. A spring planting will give a late summer show. Add a mulch of sand or ashes to protect the crown. Make sure the roots are spread horizontally so they don't get too wet and rot.