How Big Should Tomato Plants Be Before Putting Outside

Tomatoes need warmth and sunshine to grow properly, and this means that they are often started indoors in the spring before the weather has fully warmed up. Once the weather is consistently warm, it is time to move the tomato plants outside. However, it is important to wait until the plants are the right size before doing so.

Size Matters

The size of the tomato plants is crucial when deciding when to put them outside. In general, tomato plants should be at least six to eight weeks old before being transplanted outside. This gives them time to establish healthy root systems and start to develop sturdy stems and leaves.

When tomato plants are too small, they are not strong enough to withstand the outdoor environment. They may struggle to handle the wind, fluctuations in temperature, and exposure to direct sunlight. In addition, they may not be large enough to start producing fruit yet. On the other hand, tomato plants that are too big may have a harder time adapting to life outside of their cozy indoor environment. They may be root bound or have a harder time adjusting to the new environment, which can stress them and delay their growth.

How to Judge the Size of Your Tomato Plants

The best way to judge if your tomato plants are the right size for transplanting is by looking at their height, stem thickness, and the number of leaves they have. Most tomato plants should be between six and ten inches tall before being taken outside. Their stems should be roughly the thickness of a pencil, and they should have at least six to eight sets of leaves (including the cotyledons).

You can also check the root systems of your plants by carefully removing them from their current containers. The roots should be well established and fill the container without being tangled or root bound. If the roots are looking a little cramped, you can loosen them up before placing the plant in the ground. When in doubt, it is always better to wait a little longer than to risk transplanting a plant that is too small or not ready yet.

Conclusion

The size of your tomato plants is one of the most important factors to consider when transplanting them outside. A plant that is too small may struggle to survive in the outdoor environment and may take longer to start producing fruit. A plant that is too big may have a harder time adapting to life outside and will be more prone to stress and transplant shock.

By waiting until your plants are between six and ten inches tall, with thick stems and well-established root systems, you can give them the best chance of thriving in the outdoor environment. With proper care, your tomato plants will be healthy and productive, providing you with a bountiful harvest for months to come.