Maximizing celery cultivation by growing up to 364 celery plants per aeroponic tower annually. When growing celery on the towers, it takes 50 days to reach maturity from the day you transplant the seedlings. However, celery is notoriously slow to germinate, requiring up to 21 days just to germinate. It then can take 4 to 6 weeks post-germination until the seedling has reached a size for transplanting. To avoid overcrowding, sow one seed per cube of agricultural rock wool. Multiple seeds in one p