Q.I Use Scott’s 4 Part Lawn Products. Is It Safe To Use This Year’s Lawn Clippings In A Compost Pile For Next Year?
I would mix the grass/weed clippings with leaves a and plant waste from fall clean-up.
Certified GKH Gardening Expert
It can be. Just keep an eye on your nutrient levels, and don't let the nitrogen get out of hand. Keep the phosphorus and potassium levels up in the pile.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/composting/basics/ultimate-beginners-guide-composting.htm