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AgastacheCommon name; Mexican Giant Hyssop Although this plant is classified as a hardy perennial it is best treated as a half hardy annual in the UK The large flower spikes can grow to a height of 900m (36") which makes them ideal for growing as a 'cut flower. These plants are related to mint & salvia, Because of their need for winter protection and full sunshine it is probably best to grow them in containers to allow for moving them as weather conditions dictate. The fact they are drought tolerant when established this also makes them suited to ‘pot’ culture.
Week 12; Sow seed in trays of seed compost and germinate at a temperature of 21°C (70°F) Germination should take about 1 week. Established plants can be divided now, or alternatively take root cuttings to increase stock.
Week 15-18; Prick out seedlings when they are large enough to handle, and gradually harden them off in a frost free coldframe until planting out time.
Week 21; Plant out approximately 300mm (12") apart in a sunny area, if weather conditions allow.
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