Whenthesefoodremainsbreakdown, theycontributesignificantlytotheproductionofmethane, whichis a powerfulgreenhousegasthatisknowntobeoneofthecausesofclimatechange.
Andifyou'rehaving a problemwithneighborhoodcatsusingyourgardenas a litterbox, eggshellswilldiscouragethemaswell, sincetheyfindthebrokenshellsuncomfortabletostepon.
Groundeggshellsalsoworkin a waysimilartodiatomaceousearthforkeepingoutsmallerinsectsthatcrawlalongtheground, essentiallycreatingyourownchemical-freeinsecticide.
Touseeggshellsinyourgardenas a pestdeterrent, simplycrushtheshellswith a rollingpinorcoarselygrindthemin a foodprocessorandthensprinklethebrokenfragmentsanywhereyouhavebeenhavingproblems.
Justmixgroundeggshellsintothesoiltwiceperyear, onceinthefallandonceinthespring, aseggshellstake a whiletobreakdownandallowthenutrientstobeabsorbedbytheplants.