“What should I do when potting soil becomes water repellent, and I don’t have anything big enough to dunk my pots in?” Question from Ethan the Rosarian
Answer: It is very frustrating when potting soil gets so dry that it resists taking up water. We add natural & organic wetting agents to our soils to discourage this from happening, but it can still be a problem if the soil becomes completely parched. Thankfully, there is one method that will consistently rewet super dry potting soil; wetting and mixing it with very warm or hot water and then hand turning and mixing it (be sure to wear water-impermeable gloves). The heat helps the peat and compost easily take up water again. It is the most effective way to get super dry potting soil to fully imbibe water again. Just be sure to let it cool before planting.
Black Gold Horticulturist