Beginner Gardening: Question about fertilizer, 1 by FertiSorb

FertiSorb wrote:
There's one caveat to be aware of when using traditional "slow release" fertilizers. The rate of nutrient release of most slow release fertilizers is dependent upon soil temperature, generally guaranteeing their release rate at an average soil temperature of 70 degrees. During the growing season, soil temperatures can increase to over 100 degrees, even up here in Illinois where I live. This is even more pronounced with containers and hanging baskets, as they have more surface area exposed to sunlight. At a soil temperature of 100 degrees, the rate of nutrient release in these fertilizers can increase by up to 40 times. Therefore, if you're using this type of fertilizer, moderation is the best course.