Verbena - Intensity This variety produces an abundance of vivid, lilac-blue flowers above small, dark green, serrated leaves. Perfect for hanging baskets as well as pots and containers. It can be hardy with some protection, reaching the height of 30cm. Sow indoors, from January to April. A warm kitchen windowsill is all you need for starting these seeds. Sow, 0.5cm deep, in trays of compost. Water well and place in a warm position. A temperature of 20-25°C is ideal. Keep moist. Seedlings usually appear in 14-28 days. Transplant them, 5cm apart, to further trays, when large enough to handle. Always hold by a leaf, never by the stem. Grow on in cooler, but not cold conditions. Gradually accustom young plants to outside conditions, before planting out into well-drained soil, from May to June, 20cm apart, when frosts are over. Flowers from June to October.
