How do I transplant from stone wool into coco coir?

The most important thing with Coco is to get it from a reputable company. I have used CocoCanTM coco products and they have served me well. You have to make sure that the coco fibers are not too old (if the shelf life of the coco is over two years, there will be problems with wetting the coco). Also, bad companies will sell coco that have high salt content in them, so you would need to soak and flush with water to get rid of the salts before use. CocoCan is OMRI certified (organic), so it has not been buffered with chemical fertilizers. So if you decide to use an OMRI certified coco, it is important to flush through with some nutrient mix that contains either calcium or magnesium nitrate before planting, or the equivalent organic nutrient of your choice. So the steps are:

  1. If using a compressed block, soak in water (around pH 6.0) and fluff it up to get loose coco. If using a ready bag of growing mix, then just take out what you need.
  2. If the above is organic (has not been nutrient buffered), then flush through with a nutrient solution that contains higher levels of calcium and magnesium. A mix with calcium nitrate in it would work well. Keep pH again around 6.0, depending on type of plant.
  3. Transplant into the coco the plant that you started. I have successfully transplanted flower and veggies that I started in GRODAN A-Ok plugs and Gro-Blocks™, just make sure to cover the top of the stone wool with coco. Also maintain the coco right around the stone wool moist because you don't want the coco to dry quicker and wick out water from the stone wool.
  4. Then feed with a grow, and eventually bloom nutrient solution.

There are some companies that make specific nutrients for growing in coco. Ask your local hydroponic shop and they will be more than happy to help (you can find a list of stores on our website). One other hint, I have mixed in GRODAN Grow-Cubes™ in with the coco at about 1/3 Grow-Cubes to 2/3 coco, and I have had great success. The stone wool seems to add a little more aeration.