Epsom salt for sweeter tomatoes? 12 top garden hacks most people get wrong

Gardening is both an art and a science, and over the years, countless tips and tricks have been passed down through generations. Some of these methods are rooted in scientific evidence, while others are based more on anecdotal success stories. As gardeners seek to improve their yields and the quality of their produce, it's important to discern which hacks are truly beneficial and which might be more myth than fact.

In this article, we delve into 12 popular garden hacks that many people swear by, but often get wrong. From using Epsom salt to sweeten tomatoes to employing hydrogen peroxide for root health, we'll explore the science behind these practices and provide clarity on their effectiveness.

Epsom salt, or magnesium sulfate, is often touted as a miracle cure for a variety of plant ailments, including the promise of sweeter tomatoes. The theory is that magnesium, a key component of Epsom salt, is essential for photosynthesis and can enhance the flavor of fruits. However, the reality is more complex. While magnesium is indeed important, most garden soils already contain sufficient amounts. Adding Epsom salt indiscriminately can lead to an imbalance of nutrients, potentially harming plants. If a soil test indicates a magnesium deficiency, a measured application of about 1 tablespoon per foot of plant height might be beneficial, but it won't necessarily make tomatoes sweeter.

Coffee grounds are often recommended as a nitrogen-rich fertilizer, but their actual nutrient content is relatively low. They contain about 2% nitrogen by volume, along with small amounts of phosphorus and potassium. While they can improve soil structure and attract beneficial earthworms, using them as a primary fertilizer is unlikely to meet your plants' nutritional needs. It's best to compost coffee grounds first or use them as a supplementary soil amendment, rather than relying on them as a standalone fertilizer.

Eggshells are rich in calcium carbonate, which can help prevent blossom end rot in tomatoes and peppers. However, the calcium in eggshells is not readily available to plants until the shells decompose, which can take several months. To speed up the process, crush the shells into a fine powder before adding them to the soil. Even then, it's important to note that eggshells alone won't provide all the calcium your plants need, so they should be part of a broader soil management strategy.

Banana peels are often used as a natural source of potassium, which is crucial for plant growth and fruit development. While they do contain potassium, the amount is relatively small, and the peels can take time to break down. Burying banana peels near the roots of plants can provide a slow-release source of nutrients, but they can also attract pests if not properly decomposed. To avoid this, consider composting banana peels before adding them to your garden.

Vinegar, particularly horticultural vinegar with a higher acetic acid concentration, can be an effective weed killer. It works by drying out the leaves of plants, but it's non-selective and can harm any plant it comes into contact with. For small weeds, a solution of 20% acetic acid vinegar can be sprayed directly onto the leaves. However, caution is advised, as vinegar can lower soil pH and potentially damage desirable plants if used excessively.

Companion planting involves strategically placing plants together to benefit each other, such as deterring pests or enhancing growth. While some combinations, like planting marigolds with tomatoes to repel nematodes, have scientific backing, many claims are anecdotal. The effectiveness of companion planting often depends on specific environmental conditions, and what works in one garden may not work in another. It's best to experiment and observe results in your own garden.

Baking soda is sometimes used as a fungicide to control powdery mildew and other fungal diseases. It works by creating an alkaline environment on the leaf surface, which can inhibit fungal growth. A common mixture is 1 tablespoon of baking soda, 1 teaspoon of liquid soap, and 1 gallon of water. While it can be effective for mild cases, it's not a cure-all and may not work for severe infections. Regular monitoring and early intervention are key.

Using newspaper as mulch is an eco-friendly way to suppress weeds and retain soil moisture. It's biodegradable and can improve soil structure as it breaks down. However, it's important to use only black-and-white newspaper, as colored inks may contain harmful chemicals. Layering 4-6 sheets of newspaper and covering them with a layer of organic mulch can enhance effectiveness. While not as long-lasting as commercial mulches, it is a cost-effective option for many gardeners.

Milk has been used as a natural remedy for powdery mildew, with some studies suggesting it can be as effective as chemical fungicides. The proteins in milk may act as a natural fungicide, and a common mixture is 1 part milk to 2 parts water, sprayed weekly. While it can help reduce the severity of infections, it's not a guaranteed solution and works best as a preventative measure rather than a cure for severe outbreaks.

Aspirin, or acetylsalicylic acid, is believed to boost plant immunity by triggering a defense response. Some gardeners dissolve one aspirin tablet in a gallon of water and spray it on plants to enhance growth and resistance to disease. While there is some scientific basis for this practice, results can vary widely. Overuse can lead to plant stress, so it's important to use this method sparingly and observe how your plants respond.

Cinnamon is often recommended as a natural fungicide due to its antimicrobial properties. Sprinkling cinnamon on soil or plant wounds can help prevent fungal infections and deter pests. However, its effectiveness is limited to minor issues, and it should not be relied upon for serious fungal problems. It's best used as a supplementary measure alongside other integrated pest management strategies.

Hydrogen peroxide is used by some gardeners to improve root health and oxygenate the soil. A diluted solution (1 part 3% hydrogen peroxide to 32 parts water) can be used to water plants, potentially helping to prevent root rot and improve aeration. While it can be beneficial in moderation, excessive use can harm beneficial soil microbes and damage plant roots. As with many garden hacks, balance and observation are key.