This stuff is dirt cheap and available in many home improvement stores.
Also known as dolomite lime or dolomite limestone.
Keeps tick activity down 🤯.
Check it out:
https://pubmed.ncbi.nlm.nih.gov/38770710/"Results: Efficacy of liming at reducing the number of collected questing ticks ranged from 87% to 100% for larvae and 0% to 69% for nymphs 24 h postliming and from 91% to 93% for larvae and -47% to 65% for nymphs 72 postliming."