An enormous monster for the back of the border. Massive, chunky square section stems carry nine inch spikes of creamy yellow-green flowers much loved by bees and butterflies.
For best results, sow seeds in good light at any time onto a good soil-based compost. Cover the seeds with fine grit or compost to approximately their own depth. We recommend germinating at 15 to 20 degrees C. Seeds should ideally germinate in between 2 and 6 weeks although they make take considerably longer. Pot on seedlings before finally planting out into a container or a well-drained spot.
Common name:Giant Yellow Bubble-Mint