Doing so will determine how likely the plants will thrive in your hardiness zone.įor example, if your area has a long cold season, it may be best to plant cold-tolerant tomato varieties that also mature fast. b) Plant the most suitable tomato varietiesīesides protecting tomato plants during cold temperatures, it might also be a good idea to understand the varieties you can plant. If the cold season is officially kicking in, it may be time to harvest your mature tomatoes since it will be harder to protect them in the garden. However, these will not be very helpful in extremely cold weather that lasts more than a few days. You can use these covers to protect tomato plants if temperatures threaten to dip for a night since this is when temperatures are generally lower. Row covers are semi-transparent and flexible sheets you can use to keep tomato plants warm. If you suspect your tomatoes will be exposed to cold weather, the best move is to protect them with row covers. a) Use row covers for protection on cold nights Here is how you can maintain the best warm temperatures for growing healthy tomatoes. If you want to get good yields, it will be best to maintain these temperatures, and if your plants get exposed, make sure the exposure is temporary. How Can You Maintain Warm Temperatures for Tomatoes?Īs mentioned above, tomato plants survive in warm temperatures between 32☏ and 55☏. This condition prompts the seeds inside the fruit to start sprouting due to an absence of abscisic acid. If your harvested tomatoes are exposed to temperatures between 50☏ and 55☏, you will likely deal with vivipary. If your plants were doing well in warmer temperatures before the temperatures dropped, it is best to start protecting them with row covers to keep them healthy. However, prolonged exposure will likely lead to unhealthy tomato leaves and widespread tomato catfacing. The tomato plants exposed to these temperatures temporarily can thrive and produce yield. d) What will happen to tomatoes in temperatures between 50☏ and 55☏? In this temperature range, you will also likely notice some fruit catfacing and other tomato diseases such as leaf necrosis, yellowing, wilting, and poor root development. However, the fruits will be fewer as it is hard for the plants to produce enough pollen, and the cool nighttime temperatures will prevent photosynthesis. In these temperature ranges, your tomato seedlings can survive and even produce yield. If you have mature tomato plants, this cold temperature will also damage the leaves and stems, and you start noticing them get darker only to later wilt and brown. However, if the temperatures drop below 32☏, your tomato seedlings will freeze and die. Tomato plants will likely survive above-freezing temperatures over 32☏. a) What’s the lowest temperature for tomato plant survival? If you target a good fruit yield, it is best to understand the following low temperatures and how they can affect the growth of your tomato plants. The length of cold weather exposure and how low the temperatures get determines how fast your plants can wilt and die. That said, exposure to cold weather does not always mean the plants will die. In terms of cold weather, tomato plants will start struggling when temperatures dip below 55☏ When the temperatures drop or rise above this range, your plants will start focusing on survival, so you will not get any good yield, and that is if the plants survive. As warm weather plants, tomato varieties can only survive and yield healthy fruit in temperatures between 55☏ and 75☏, according to this Penn State University article.
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