I am doing some part time work at a local agency running a garden program. the agency has always purchased Miracle Grow potting mix at the local stores, because it is cheap and because it is local!
But I am noticing more and more problems with some of our greenhouse plants and the horrible GNATS that are infesting us! I would LOVE to be using some kind of soilless mix like Jiffy Mix or Pro-mix, but know that they are way more expensive and not often found at the main chain stores around town. We also have a problem with our watering reliability...more often than not, our plants are overwatered and soggy, creating a perfect place for our lovely fungus gnats to breed! (I only work there twice a week, so can't control the watering amount very well!)
Do any of you have any experience with either Jiffy Mix or Pro-mix? Or know where I can find it relatively inexpensively?
Is there a benefit for using a soilless mix like these versus the regular Miracle Gro Potting Mix?
I do a lot of seed starting with the agency, as well as transplanting and propagating of houseplants.
Thanks for your help!