Anti-worm killing treatments for lawns
Fertilizer products that do not contain herbicides or pesticides should be fine for your worms (ammonium nitrate, ammonium sulfate, urea). You might also consider compost or other organic fertilizers. These generally contain lower nutrient percentages, but will still get the job done if applied appropriately.
Hello Kelly, thank you so much for your reply, very helpful. I am sad that manufacturers are allowed to sell these products as I had no idea it was so lethal to worms and it gave no warning on the packaging.
You're most welcome, Anne.
Best of luck to you and your worms. :)