Why are my tomatoes flowering but not producing fruit?
A lack of pollination due to extreme temperature or humidity is a common cause of tomato plants flowering without producing fruit. Other environmental factors that can delay fruit production include water, light, nutrient deficiencies, pests, and diseases.
In hotter climates, high temperatures can sometimes play havoc with pollination. Hot spells, when daytime temperatures remain above 30ºC (86ºF) and, crucially, nighttime temperatures fail to dip below 24ºC (75ºF), have the undesirable effect of turning pollen sterile. Turns out tomatoes like it hot – but not too hot!
If you're faced with tomato plants not setting fruit, the best thing to do is to keep the plants healthy and fertilized with plant food, such as Miracle-Gro® Shake 'n Feed® Tomato, Fruit & Vegetable Plant Food. The plants will start to produce again when the weather becomes favorable.
Some growers prefer to use a high-phosphorus fertilizer, indicated by a larger middle number. You can also keep things simple with a fertilizer especially formulated for tomatoes – usually with a ratio like 3-4-6 or 4-7-10. Most importantly, don't over-fertilize. Too little fertilizer is always better than too much.
ANSWER: The window of time between flowering and fruiting is approximately 20 to 60 days. Why such a large gap in the range? It has much to do with the type of tomato you've planted. Smaller varieties produce fruit faster than larger varieties.
To speed ripening late in the season, remove the growing tip of each main stem about four weeks before the first expected fall frost. Called "topping," this type of pruning causes the plant to stop flowering and setting new fruit, and instead directs all sugars to the remaining fruit.
Tomatoes need night temperatures between 55 to 75 degrees F in order to retain their flowers. If the temperatures fall outside this range, blossom drop occurs. Other reasons for blossom drop on tomatoes are insect damage, lack of water, too much or too little nitrogen, and lack of pollination.
There's no one set amount for this. There are dozens of factors that can influence how much water a tomato plant needs at any given time. These factors can include age of plant, size of plant, type of soil, current temperatures, and humidity, state of fruit, and amount of fruit as well as weekly rainfall.
Fruit trees prefer an organic, high nitrogen fertilizer. Blood meal, soybean meal, composted chicken manure, cottonseed meal, and feather meal are all good, organic nitrogen sources. There are also specially formulated fruit tree fertilizers.
Reduce watering when the plants begin to fruit
This helps concentrate the flavors of the fruits but also reduces cracking and splitting which can be caused from too much water. I also slow down watering of cherry tomatoes as too much water means those super-sweet fruits can split.
Why do my tomato plants have flowers but no tomatoes?
If you have plenty of big blooms but no tomatoes, it may be too cold and wet or too hot and dry. This results in what is known as blossom drop and will, of course, make it much more difficult for plants to produce fruit. Poor pollination – Weather can also be a factor with pollination.
Too many flowers on a tomato plant will cause competition for nutrients among the flowers. As a preservation method, the tomato plant will automatically abort and drop flowers. After your plant goes through a fruiting process, this problem should correct itself without intervention as long as the soil is good.
Cherry tomato plants should produce continuously throughout the rest of the growing season, if they are indeterminate. They form flowers along the sides of the shoots, but the shoots keep growing. Determinate plants, which are smaller and mostly grown in containers, stop forming shoots once flowers are formed.
Manure is a good source of nitrogen and potassium, and blood and bone meal can be used to boost levels of nitrogen and phosphorus in soil. Ash, oyster shell flour, seaweed, phosphate rock and compost also can be used to provide added nutrients to promote healthy and fast-growing tomato plants.
Pinch or prune yellowed leaves to prevent disease, improve the tomato plant's appearance, and help the plant keep its energy focused on fruit production. Don't over prune in hot climates. If you grow tomatoes in an area that is hot, be careful not to over prune.
2 If left unpruned, these suckers will eventually grow into full-sized branches, adding lots of foliage and, eventually, a few fruits. This will also result in a tomato plant that quickly outgrows its space in the garden.
Removing leaves is a great way to speed up the growth of new tomatoes. I use this trick often for my plants outside. Removing some of the leaves will help the sun reach the tomatoes, and they will ripen faster. The plant will focus more energy on growing the tomatoes if you remove some of the leaves too.
Hand pollination of tomatoes is a simple process and it should be conducted on a warm sunny day for optimal results. You can simply shake the flowers by tapping behind the flower with your finger or with a pencil to stimulate the plant to release pollen.
Late in the season use an Epsom salt spray to increase tomato and pepper yield and keep plants green and bushy; early in the season add Epsom salt to the soil to aid germination, early root and cell development, photosynthesis, plant growth, and to prevent blossom-end rot.
Although it seems silly, this simple garden trick really works. The baking soda absorbs into the soil and lowers its acidity levels giving you tomatoes that are more sweet than tart.
Can I spray Epsom salt on tomato plants?
Make up a solution of about a teaspoon of Epsom salts per litre (quarter gallon) of water in a spray bottle. Simply wet the foliage on your tomato plants every two weeks using a fine spray setting. It will quickly be absorbed by the leaves. Avoid spraying on hot, sunny days or when rain is imminent.
Adding Epsom salt is a simple way to increase the health of their blooms, and is something that you can include easily as a part of a normal routine. For potted plants, simply dissolve two tablespoons of Epsom salt per gallon of water, and substitute this solution for normal watering once a month.
Tomatoes need plenty of room to grow. Commercially, most growers use a two-foot spacing within rows. If you want really large fruit, give them even more room. One of the most common errors by novice gardeners is planting tomato plants too close together.
Cottonseed meal is a fantastic slow release fertilizer. But it might be hard to find. Another good natural tomato fertilizer is a cottonseed meal. It contains nitrogen, potassium, and phosphorus, so it supports all stages of growth.
Fungicide. Another widespread use of vinegar with tomato plants is as a fungicide. As these plants are prone to many fungal diseases, some people mix 2-3 tablespoons of vinegar into 1 gallon of water and then spray the tomato leaves with the mixture.