I noticed when i went to Bunnings how strong, healthy and vibrant the larger seedling plants looked in the pots. They had thick stems, green foliage and approx 500mm tall, in maybe 150mm pots. I was wondering what their gardeners do to achieve such healthy plants, is there a special soil mix or fertiliser they use? How are the seeds started, ie; what medium are they sown in? Are they grown in small trays then transplanted into the larger pots? Thanks