Slugs lay eggs in clusters in damp, shaded soil, and eggs hatch within 3 to 4 weeks. Slugs develop slowly and may live for over a year. Slugs cannot survive in direct sunlight, and need high humidities and cool temperatures to thrive. Without protective hiding places, they rapidly lose body moisture and die. Shaded flower beds and heavily mulched gardens are ideal habitats.
Slugs readily hide under boards, leaves and other debris that helps retrain soil moisture.
In greenhouses, slugs hide under pots and under debris beneath benches. There are several of options for controlling slugs. Numbers will be high during and following damp rainy weather, and will almost disappear during dry periods. Non-chemical Reducing daytime hiding places will help eliminate slug problems. Remove boards, rubbish, unused pots and rocks from your garden.