Tomato plants get heat stressed when daytime temperatures exceed 90∘ F ( 32∘ C) or nights stay above 75∘ F ( 24∘ C). The most obvious signs of this stress include curling leaves, flower drop, and stunted ripening.
Tomatoes start to suffer when daytime temperatures exceed 95∘ F and nighttime temperatures remain above 75∘ F. While the plants themselves can survive, this extreme heat stresses them out and causes "blossom drop," where flowers fall off before they can pollinate, effectively halting all new fruit production.
Gardeners use baking soda around tomato plants primarily to prevent fungal diseases, deter pests, and potentially sweeten the fruit by adjusting soil acidity.
Attaching shade cloth to a frame using clothes pins or clips along the southwest side of your beds will protect your plants while still keeping them easy to harvest. Using shade cloth during the hottest time of day can reduce ambient temperatures by 10 degrees.
Coffee grounds are added to tomato plants because they provide a slow-release source of nitrogen, improve soil structure, and can help deter pests like slugs and snails. They are best used in moderation or mixed into compost rather than piled thickly, as too many can compact the soil.
Tomatoes benefit from the nutrients in eggshells and coffee grounds, but the way you use them matters.
The best homemade tomato fertilizer is a nutrient-rich, liquid compost tea. It delivers a gentle, balanced boost of essential macronutrients (nitrogen, phosphorus, and potassium). To make it, steep a shovelful of aged manure or compost in a 5-gallon bucket of water for 24 hours, strain the liquid, and water your plants.
Hot weather can cause tomato flowers to wither and become brittle, falling off the plant easily. During long stretches of hot days in the 80s and 90s, you may experience disappointing yields in your vegetable garden. Bushy cucumber plants with no fruit, tomatoes not ripening, and beans with no flowers are typical.
Never plant fennel, brassicas (like cabbage, broccoli, and kale), potatoes, or corn near tomatoes. These plants can stunt tomato growth, compete aggressively for nutrients, or spread devastating diseases and pests.
Gardeners bury an egg in the planting hole because it acts as an organic, slow-release fertilizer. As the egg decomposes, it releases essential nutrients like calcium, nitrogen, and phosphorus directly to the tomato roots, which helps build stronger stems and prevents blossom end rot.
To maximize the sweetness of your homegrown tomatoes, focus on maximizing sun exposure, carefully restricting water as they ripen, and adjusting the soil's chemistry and nutrient balance.
Spray your tomato plants with a baking soda solution every 7 to 14 days. If you are actively treating a fungal infection (like powdery mildew or blight), spray every 5 to 7 days until the issue is under control.
The best tomato fertilizers provide a balanced ratio of nutrients (N-P-K) heavy in phosphorus and potassium, along with extra calcium to prevent blossom end rot. High-performing organic options include Espoma Tomato-tone and Dr. Earth Organic Tomato Fertilizer for sustained, long-term feeding.
By providing your plants with the right care and attention, they can recover from heat stress and continue to bring beauty and joy to your living space.
In most cases, no, you should not water in-ground tomatoes every day, even in hot weather. Instead of frequent light waterings, give them deep, thorough waterings 2-3 times a week. This encourages a deep, robust root system, which helps the plant survive drought and extreme heat.
The best overall companion plant for tomatoes is basil. It thrives in the same growing conditions, repels pests like mosquitoes and thrips, and is widely believed to enhance the flavor of the tomatoes themselves.
When tomato plants grow large and lush but produce no fruit, the most common culprit is a nutrient imbalance (too much nitrogen), extreme temperatures, or poor pollination.
Make some shade
Look for "50 percent" shade cloth, which reduces sunlight by 50 percent and heat by 25 percent. Or, experiment with summer-weight row covers, which typically provide about 15 percent shade. In regions where sunlight and heat are not as intense, of course, shading tomatoes isn't typically necessary.
Coffee grounds provide tomato plants with slow-release nitrogen, essential trace minerals (potassium, phosphorus, and magnesium), and can slightly lower soil pH. This encourages leafy green growth and boosts overall fruiting. However, fresh grounds should be composted first to prevent soil compaction and root damage.
It can take anywhere from a couple of days to a couple of months for stressed plants to recover. Recovery time depends on the amount of damage that the heat caused to the plant. If a stressed plant is completely neglected during a heatwave, it can take several months or even be impossible to revive it.
I'm sure you have heard the old saying that snow is “poor man's fertilizer.” The saying comes from the idea that snow storms deliver small but meaningful nutrients to the soil and there is real science behind that. As snowflakes fall, they collect nitrogen and ammonium and release them during the melt.
It is important to make sure the tomatoes receive sufficient water during the season. The soil should be soaked 6 to 8 inches deep at 7-day intervals. Mulches such as wheat straw or composted leaves around the tomato plants will prove to be a real asset in conserving soil moisture during July and August.
Urea fertilizer is the most important nitrogenous fertilizer. There are two main reasons for urea fertilizer to be the king of fertilizers. Firstly, it has high nitrogen content about 46 percent. Secondly, it is a white crystalline organic chemical compound. It is neutral and can adapt to almost all the land.