Forget Me Not Indigo flowers are attractive grown on their own in borders and rock gardens, or amongst wall-flowers and spring bulbs. Forget-Me-Not produces a sea of deep blue for many months at a time. Best treated as an annual but will often seed naturally – very easy to grow. Thrives in semi-shaded situation and grows to a height of 30cm. Sow 5mm deep in flowering position. Keep moist as germination may be slow. Thin out to 15cm apart. Alternatively, can be raised in seed boxes or trays using seed raising mix.Sow late summer to early winter. Late Summer to early Winter.