Yes, used tea bags (especially dry ones with their rough texture and strong scent) or loose tea leaves are believed by some gardeners to deter slugs and snails by being off-putting, though effectiveness can vary, with many finding coffee grounds or rough barriers more reliable for keeping these pests away from vulnerable plants.
What Plants Do Slugs Not Like?
Copper tape. The use of copper is also believed to be a good remedy for slugs. Copper is considered to be a natural slug repellent as the mucus they secrete from their body (their slime) reacts with the metal, producing a tiny electric shock.
Tea Can Work As A Natural Fertilizer
As the tea leaves and bag begin to break down and decompose, they release nutrients into the soil that helps plants retain water and thrive. That said, you should use tea only on your plants that like acidic soil.
Repel rodents and insects
Rats, mice and other insect don't like the smell of peppermint, lemon, and cinnamon. Make tea with these rodent irritants and place the used teabags in places like the back of your pantry, under the kitchen sink or behind the refrigerator to repel these unwanted pests.
“The strong scent of tea is unappealing to slugs and snails, making it an effective deterrent," Chris explains. “Simply placing used tea bags around flower beds and vegetable patches can help keep these pests away.” The smell can also discourage cats and foxes from digging up gardens.
When you next make a cup of tea don't throw away the old bag because it has many uses that you might not know about. Black tea contains tannic acid and theobromine which removes heat from sunburn so rubbing cold tea water on sore skin will soothe pain. Old tea bags can also be used to flavour rice or pasta.
Used tea bags and coffee grounds are a great way to prevent pests from eating and destroying your garden. Simply bury the tea bags or sprinkle the coffee grounds around your plants. Another way is to brew the used tea bag again for a weak tea that can be poured over the leaves and around the plants.
If you're growing a victory garden with homegrown herbs, avoid using tea water or tea leaves for these varieties.
Dried tea isn't a very appetitive substance for invasive insects. Larvae wouldn't thrive on it, so you have a very low risk of something happening.
Slugs are active for most of the year but are a particular problem in spring, when there's plenty of young growth for them to eat. They are mostly active after dark, especially when it's warm and damp. In hot, dry weather they bury themselves in the soil or hide in cool, dark places to avoid dehydrating.
Slugs are nocturnal, typically feeding from dusk to dawn. They may also feed during rainy or overcast days. During the day, slugs hide in soil crevices and under crop residue, which is why reduced- and no-till fields are at greater risk for damage (Photo 4). They prefer high humidity and temperatures below 70°F1.
Stake plants and prune lower leaves to raise plants off the soil and away from slugs. If planting in rows, make plant rows narrow (12 to 18 inches wide). If soil is constantly damp, improve drainage by amending soil with compost. While chopped leaves make an excellent mulch, too much can encourage slug habitat.
Control strategy
Good seedbed preparation is crucial in controlling slugs. Start by removing weeds and green cover as potential hosts and feed source for slugs. The aim should be to have a fine firm seedbed which restricts slug movement making it difficult for them to find seed and seedlings.
They seek moist, shaded areas during sunny days and hibernate in topsoil during cold weather. Indoors, they are attracted to damp areas and leave shiny silvery slime trails.
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 slugs and snails out of your flower and vegetable beds. Grounds will repel slugs, but the USDA research team confirms that a caffeine solution is more effective.
Tea contains nutrients like tannic acid and other minerals that are beneficial to plants. Used teabags can be buried near the roots of acid-loving plants such as roses, hydrangeas, or rhododendrons.
Cauliflower, broccoli, kale, chives, garlic, leeks, onions, peppers, beets or any member or the onion family. Friendly garden neighbors: Carrots, celery, chard, corn, cucumber, eggplant, parsnip, peas, potatoes, radish, and strawberries.
Tea is not just a comforting beverage. It can also be a valuable addition to your garden. Used tea leaves are rich in nutrients like nitrogen, potassium, and phosphorus, making them an excellent natural fertilizer.
Plant feed: Used tea bags double as a handy fertilizer because of their tannic acid, which in turn foster increased nitrogen levels. Many plants, including roses and potted plants, will benefit from the elevated levels, so mix or spread those steeped tea leaves right onto the soil.
1️⃣ Prevent Mold in Closets – Place dried tea bags in closets to absorb moisture and keep mildew at bay. 2️⃣ Garden Fertilizer – Toss used staple-free tea bags into compost or soil for extra nutrients. 3️⃣ Insect Repellent – Use dried tea bags in pantry shelves or closets to deter pests.
Tea bags, especially those containing black tea, are naturally hygroscopic, meaning they absorb moisture from the air. This ability allows them to act as small, natural dehumidifiers inside a vehicle. Absorption: The tea leaves soak up excess moisture in the air, reducing humidity levels.
“Never squeeze your teabags, as this can make your tea taste bitter due to the release of tannic acids,” explains Angela Pryce, senior tea buyer at Whittard. “Instead lift it out carefully after 3-5 minutes of brewing.” Our expert Dr Bond says five minutes is the optimum time to let your tea brew.
Old tea may simply be less flavorful and fresh than new tea, and will brew up a weaker cup with a stale flavor. In this sense, tea doesn't actually have an “expiration date” after which it will be unsafe to drink. However, if stored improperly, tea may become stale or dull more quickly.
Our tea bag and tags are made from plant-based and biodegradable materials and have been certified as home compostable to Australian standard AS 5810 and industrially compostable to standard AS 4736 since March 2024. Our tea tags are made from paper using plant-based inks and attached with a cotton string.