Lettuce Bolting: Causes, Prevention, And Solutions

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Welcome to our blog post for the year 2023! Today, we will be discussing a common issue faced by gardeners – lettuce bolting. In this article, we will explore the causes of lettuce bolting, ways to prevent it, and possible solutions to tackle this problem effectively.

What is Lettuce Bolting?

Lettuce bolting refers to the premature flowering and seed production of lettuce plants. This phenomenon occurs when lettuce plants transition from the vegetative growth stage to the reproductive stage earlier than desired. It often leads to bitter-tasting leaves, making them less desirable for consumption.

Causes of Lettuce Bolting

Several factors contribute to lettuce bolting:

1. Temperature:

High temperatures, especially prolonged exposure to temperatures above 75°F (24°C), can trigger lettuce bolting. Lettuce is a cool-weather crop, so extreme heat can induce the plant to bolt and produce seeds.

2. Day Length:

Lettuce is sensitive to changes in day length. When the days become longer, lettuce plants perceive it as a signal to start flowering and seed production. This typically occurs during the summer months when daylight hours are extended.

3. Stress:

Stressful conditions, such as drought, lack of water, and poor soil quality, can also contribute to lettuce bolting. When plants experience stress, they divert their energy towards reproduction as a survival mechanism.

Preventing Lettuce Bolting

While it may not be possible to completely eliminate lettuce bolting, certain measures can be taken to minimize its occurrence:

1. Choose the Right Variety:

Some lettuce varieties are more prone to bolting than others. Opt for heat-tolerant varieties or those specifically bred to resist bolting.

2. Provide Shade:

During hot summer months, use shade cloths or plant taller crops to provide shade and reduce the direct sunlight on lettuce plants.

3. Optimal Planting Time:

Sow lettuce seeds in early spring or late summer when temperatures are cooler and day length is shorter.

Solutions for Bolting Lettuce

If your lettuce plants have already started bolting, here are some steps you can take:

1. Harvest Leaves Early:

Even if your lettuce plants have bolted, you can still salvage the situation by harvesting the leaves early. The younger leaves are less bitter compared to the older, bolted ones.

2. Remove Bolting Plants:

If the majority of your lettuce plants have bolted, it may be best to remove them from the garden bed to prevent them from affecting the non-bolted plants.

3. Plant Succession Crops:

Practice succession planting by sowing lettuce seeds in batches. This ensures a continuous supply of lettuce and reduces the chances of all plants bolting simultaneously.


Lettuce bolting can be frustrating for gardeners, but with the right precautions and actions, it can be managed effectively. By understanding the causes, taking preventive measures, and implementing appropriate solutions, you can enjoy a bountiful harvest of delicious, non-bolted lettuce throughout the growing season.

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