![]() ![]() As a result, the lower leaves are not able to produce as much energy from photosynthesis. As a tomato plant ages, it grows taller and gets more leaves at the top.Īs the top leaves grow larger and more numerous, they shade the lower leaves from sunlight. Their leaves will turn yellow due to age later in the season.Īnother thing to keep in mind is the way that tomato plants grow. Indeterminate tomatoes are taller and requires takes to support them. Since indeterminate tomato varieties produce fruit for a longer duration, their leaves will turn yellow later than determinate varieties. Indeterminate – these tomatoes are taller (they can grow 6 to 8 feet or taller!), and they produce fruit throughout the growing season, until cold or frost stops them.Determinate – these tomatoes are shorter (generally up to 4 or 5 feet tall), and they produce fruit just once during the growing season.The time when yellow leaves appear will differ, depending on the type of tomato. This happens sometime after the plant finishes fruit production for the season. AgeĪs tomato plants age, their leaves will eventually turn yellow. We’ll start with age, since this is common at the end of the growing season. Let’s take a closer look at each of these causes now. Leaves at the bottom of tomato plants at a glance. The table above summarizes the causes of yellow The table below summarizes the causes of yellow leaves at the bottom of tomato plants at a glance. Some common causes of yellow leaves on tomato plants include: It occurs when the leaves cannot make enough chlorophyll. Chlorosis, or yellowing of leaves, can occur on any plant, including tomatoes. ![]()
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