Brilliant Mixture Balsam Seeds (Touch-Me-Not) Heirloom Flower. Impatiens balsamina is a charming old heirloom favourite with double and semi-double flowers carried above bushy, green foliage. This mixture contains the full colour range and once flowers start, the plants will bloom all summer. Plants enjoy moist soils and grow to 60 cm (2′) in height. Flowers are pollinated by bees and other insects. Mature flower capsules will harmlessly ‘explode’ when handled.