Basically it boils down to three main methods:
- Planting plnts in between that deter pests like leeches (also onion, garlic) and herbs etc.
- Using herbal infusions from plants like burn7ng nettle or those containing mustard oil.
- Attracting pest predators. This goes all the way from buying eggs of vertibrates (careful to not introduce invasive species) to just making your garden bird and bat friendly.