The major cause of tomato flower drop is unfavorable climatic conditions. High daytime temperatures (above 85 degrees Fahrenheit) and low nighttime temperatures (below 55 degrees Fahrenheit) interfere with pollination, causing blossom drop. Daytime temperatures of 70 to 85 degrees Fahrenheit are ideal for tomato growth. (Cherry tomatoes set fruit at temperatures higher than other large-fruited tomato varieties.) Blossom drop may also be caused by strong winds and dry soil conditions. Flowers are desiccated by strong winds, and tomato plants are stressed by dry soil conditions.
There is nothing that can be done about the weather. During dry conditions, water tomato plants deeply once a week. Fruit set should increase as temps cool.
When can I plant cherry tomatoes outside?
Plant cherry tomatoes when the danger of frost has gone in the spring. You can also start seeds indoors 4-6 weeks before your area’s projected frost date and then plant the seedlings outside when they are at least six inches tall with 2-3 sets of true leaves.
Can you plant cherry tomatoes in the fall?
Fall is a good time for developing tomatoes because the cooler temperatures allow for better fruit set and insect problems diminish. The best period to plant is from mid-July until the end of August. When picking your autumn tomatoes, make sure you know if you want Determinate or Indeterminate varieties.
Are tomato plants OK at 40 degrees?
While mature plants may withstand minor frosts, temperatures below 40 F harm bloom and fruit development, making tomatoes perennial only in USDA zones 12 and higher.
What temperature can you plant tomatoes outside?
Warm season crops, such as beans, tomatoes, peppers and squash can germinate at minimum soil temperatures of 55 – 60 degrees. When planting transplants, the same soil temperatures should be employed.