Leggy Tomatoes


Question:

I have started some tomato plants in the hopes to start my own garden this year. They have sprouted and are now getting tall and spindly. How do I strengthen them up?

Minnesota Master Gardeners say:


Your tomatoes aren't receiving enough light. A sunny window is not sufficient for growing a sun-loving plant like a tomato. Fortunately, there is a simple and inexpensive solution: a standard shop light. Simply hang the light on chains so it can be raised as your plants grow. It need not be more than an inch or so above the top of the plant.

Also, start a fan near your plants. The wind will help strengthen the stems. Have the fan on low 8-10 hours a day and turn your seedlings so the breeze comes from different directions occasionally.

As soon as the weather is warm enough, you can start taking your seedlings outside and gradually build up their tolerance to sunlight. The combination of sun and breeze outside will do wonders. Just be sure to build up the tolerance (called hardening off) to the sun gradually. It is very easy to burn your tender plants if you overdo it.

Finally, you may want to adjust your planting date next year. Many people start their tomato plants too early, and when it comes time to put the plants outside, they have become quite leggy. Determine what date you are going to plant them outdoors (about Memorial Day in the Twin Cities), then count backwards 6 to 8 weeks to determine the planting date.

For further reading,
Tomato time - well, almost: http://www.extension.umn.edu/yardandgarden/YGLNews/YGLN-Mar0101.html#tomato
Starting seeds indoors: http://www.extension.umn.edu/projects/yardandgarden/ygbriefs/H236startseeds.html