If you have no problems with damping off then use whatever mix works well for you. I have serious damping off issues when I use any other mix besides DE. Adding a little fertilizer to the water is just not that much of an issue. I use Urban Farms Vegetable or Apples & Oranges at between half and full strength when watering my seedlings as soon as they start popping up and can once again use the dense planting method which saves so much room in my small greenhouse. Before using DE I would frequently lose 75% of all my tomato seedlings to damping off and sometimes all of them when using the dense planting method. Now tomato seed starting is stress free instead of a hand wringing frustrating experience.
Bill
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