Diluting brewed coffee with an equal part water is plenty to do the job. Coffee grounds have been recommended in the past as an organic method to keep
Plants that slugs hate
As well as those with tough leaves or woody stems that they find difficult to chew. The robust lacy fronds of shade-loving ferns and thick leaves of Geranium, Bergenia (Elephant's ears) and Saxifraga × urbium (London pride) are all too thick for them to sink their teeth into.
Coffee grounds are rich in nutrients, especially nitrogen. They also have some amount of other nutrients like potassium and phosphorous. Overall, this means that adding coffee grounds to your garden can work fairly well as a fertiliser. Coffee should be spread in a thin layer, rather than being clumped in one place.
1) Crushed eggshells/gravel/woodchip or mulch Molluscs don't like travelling over rough ground, so if they sense sharp edges, you can use this texture to deter them. 2) Coffee grounds. Slugs don't like the bitter taste of coffee grounds. Sprinkle coffee grounds on the soil around your plants to deter them.
Nematodes are the best way to kill slugs naturally – simply water onto the soil around your plants and let them get to work. Salt kills slugs naturally, however, it takes a lot of salt and should not be applied near your plants.
Line your borders with upturned eggshells. The sharp edges will stop slugs sliding past as they don't like the feeling. Create a rough area around your plants with sand or gravel to make it harder for the slugs to reach the plants they have their hungry eyes on.
Garlic, Lawn Chamomile, chives. Some plants repel most slugs and snails and these may have a deterrent effect when planted alongside or used to make an extract. Many gardeners swear by garlic as a natural pest control. Some say chives are effective it the leaves are tied around vulnerable plants; sounds fiddly.
As vinegar is mildly acidic, it will kill any snails or slugs it touches. However, vinegar is toxic to vegetation, so only spray snails or slugs that haven't yet reached your plants.
Repel Pests Aphids, caterpillars, snails, slugs, and other plant eating creatures can be kept at bay by simply sprinkling some tea leaves into the soil. It is believed that this works because these creatures do not like the smell of the caffeine present in tea.
Plant slug repelling plants
Astrantia gives off a scent that repels slugs and snails and so acts as a natural pesticide. Wormwood, rue, fennel, anise and rosemary all have the same effect.
In most cases, the grounds are too acidic to be used directly on soil, even for acid-loving plants like blueberries, azaleas and hollies. Coffee grounds inhibit the growth of some plants, including geranium, asparagus fern, Chinese mustard and Italian ryegrass.
The main ingredient in the used grounds is nitrogen, but there are traces of the other important nutrients like phosphorus and potassium. Fresh coffee is highly acidic, so may be useful for acid loving plants like magnolias and blueberries or for gardeners wanting to turn their hydrangeas blue.
Lewis Spencer adds: 'To use coffee compost, simply sprinkle the grounds directly onto your soil and lightly rake it in. Coffee grounds add organic material to the soil, helping water retention, aeration, and drainage. 'Leftover diluted coffee can create a liquid plant fertilizer, too.
Crushed Eggshells
The edges are sharp enough to hurt slugs should they decided to slide over them. So, when gardeners spread the eggshells around their beloved plants, the crushed shell pieces are to form a protective barrier that slugs and snails should know better than to cross.
Some birds, frogs, toads, hedgehogs, slow-worms and ground beetles eat slugs and these predators should be encouraged in gardens. Raking over soil and removing fallen leaves during winter can allow birds to eat slug eggs that have been exposed.
Egg shells are a super effective option when you spread them as a barrier ring around plants. If you live near a beach, you can also use crushed up sea shells. Broken egg shells and sea shells have sharp edges that hurt snails and slugs as they try to crawl over them.
Caffeine in large doses is said to be toxic to slugs, and in smaller doses it can slow them down. It has also been noted that the mere smell of coffee deters slugs and snails. In addition, others state that ingredients in the coffee grounds stimulate their mucus production. This would deter them from crawling over.
Slugs love citrus, so don't throw away your orange or lemon rinds. Instead put them in your garden to bait the slugs and snails away from your plants. In the morning, check your peels to see if any slugs or snails are on them, and remove these from your garden.
Baking soda sprinkled onto slugs will kill them. But a far more effective way to deal with slugs in your garden is by attracting birds and other creatures that will eat them.
Spraying WD40 on the outside of pots or planters will make them too slippery for slugs to climb. This can be effective for pots and planters that sit on a path or patio, but should be kept away from soil or other plants.
Does Epsom salt work for slugs? Yes, Epsom salt for slugs can deter slugs in the same way that regular table salt can.
First things first, head down the path of aromatic plants, Herbs like mint, sage, thyme, basil, parsley and rosemary are great repellents because slugs and snails don't like strong scents.
Sprinkling salt does kill slugs, but it is also harmful to plants.