The calcium in the shells will strengthen the tomato plants, give you more buds (aka: tomatoes!) and sometimes even prevent blossom end rot – that brown disease that sometimes makes the bottom of your tomatoes brown and yucky!!
"Plants like strawberries, blueberries, kale, and cabbage prefer slightly acidic soil and adding in eggshells can do more harm than good," says Jen McDonald, certified organic gardener and co-founder of Garden Girls, a garden design company based in Houston, Texas.
Depending on the size of your garden, compile enough of each component to contribute a moderate amount to each hungry plant. Combine the two together, crush the eggshells by hand even more (which should be easier now that they're fully dry), and sprinkle the mixture across the soil bed.
While plants need nitrogen (remember the NPK on fertilizers), too much nitrogen will create lots of green leaves but few berries or fruits. This means potassium-rich banana peels are excellent for plants like tomatoes, peppers or flowers. Banana peels also contain calcium, which prevents blossom end rot in tomatoes.
If you don't have a hot compost, we recommend giving the eggshells a quick wash before they plunge into your pile. Many composters will tell you they've composted eggshells in the past, only to find them still intact years later. This is because eggshells are tough to crack (pun well and truly intended).
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.
Symptoms of calcium deficiency include stunted plant growth, leaf curling, dark leaf veins, weakened plants, and blossom-end rot in fruits. Fruit plants like tomatoes and peppers may develop dark, sunken areas in the fruit.
How often can I put coffee grounds on my tomato plants? A sprinkling of coffee grounds mixed into the soil before planting tomatoes will not harm the plants. However, no additional coffee grounds should be added to the soil during the growing season.
The biggest benefit after tomatoes is to cucumbers. Place the crushed shells of a dozen eggs right down in their planting holes to provide easy-to-reach calcium, and your cukes will be noticeably crisper — and that crispness will extend to any cukes that you put up into pickles.
Many gardeners use eggs in the garden to boost soil nutrients. Try putting eggshells in your compost. You can also plant eggshells or a whole egg in the hole before planting tomato plants.
Banana peels are also brimming with potassium, which is excellent for plants like tomatoes, peppers or flowers. “Banana peels also contain calcium, which prevents blossom end rot in tomatoes,” the Cape Gazette adds.
Many strange gardening hacks circulate the internet, from coffee grounds to banana peels to tea bags. Purportedly, adding these household materials to your garden soil improves plant growth. Many sources recommend adding eggshells to tomato plants for a fertilizer boost.
What Plants Don't Like Coffee Grounds? Knowing that most coffee grounds are acid-leaning, don't use fresh coffee grounds on plants that prefer alkaline soil. This includes asparagus, campanula, salvia, achillea and Mediterranean herbs like lavender, thyme and rosemary.
To use coffee grounds as a fertilizer sprinkle them thinly onto your soil, or add them to your compost heap. Despite their color, for the purposes of composting they're a 'green', or nitrogen-rich organic material.
Mice typically do not like coffee grounds scattered around the kitchen. The strong aroma of coffee is generally unpleasant to mice, which can act as a deterrent.
Crush the eggshells – Once dry, I lightly crush the eggshells. This doesn't have to be perfect; just enough to break them down into small pieces. Prepare your garden – When planting seeds, I sprinkle the crushed shells into the planting holes.
It is beneficial to use egg shells when growing your own vegetables like tomato, pepper and aubergine or plants such as roses, hydrangeas, spider plants, ferns and ivy. Another way to add this homemade fertiliser to your plants is through a calcium solution.
The results showed the eggshell-infused water contained 4 milligrams of calcium and potassium. "Eggshells will add some immediate calcium to the soil if ground up to a fine powder," Austin wrote.
Soil is alive and has its own ecosystem. If a banana peel is buried in the soil, microorganisms will work to break it down. But this can take away from the microorganisms providing the current nutrients in the soil to your plants.
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.
Start by cutting your banana peels into small pieces and putting them in a bucket or container and covering them with water. Leave them for two to three days. Stir occasionally. Strain and use the liquid to water your plants.