Biological Pest Control: Nematodes As A Chemical-Free Option

Sited well and left in peace, an insect house can become a genuinely busy part of the garden. Many gardeners start by comparing a few insect houses before choosing one to match the space available.

Fish are worth thinking through carefully. Ornamental fish will happily eat frogspawn and tadpoles, so a pond intended mainly for amphibians is usually better left fish-free. Leaving some leaf litter to settle at the bottom over autumn also gives amphibians a place to shelter through the colder months.

Plant choice shapes how much a garden offers wildlife across the year, and it is about more than flowers alone. Shape, structure, timing and what a plant offers after flowering, whether berries, seed heads or dense cover, all matter as much as bloom colour.

Feeding is straightforward but worth getting right. Meaty cat or dog food, or a specialist hedgehog food, is a better choice than bread and milk, which can cause digestive upset. A shallow dish of fresh water features for garden ponds left out overnight is just as useful as food, particularly during dry spells in summer.

Access is usually the first barrier. Solid fencing and walled boundaries cut a garden off from the wider network a hedgehog relies on. A gap roughly the size of a CD case cut at the base of a fence panel, sometimes called a hedgehog highway, lets them pass between neighbouring gardens without needing to cross open roads or driveways.

Nematodes are microscopic roundworms that occur naturally in soil, and certain species have been developed for use against specific garden pests. Rather than acting as a broad chemical treatment, each nematode species is matched to a particular pest, seeking it out and interrupting its lifecycle with far less impact on the rest of the garden than a chemical spray.