“If I grew tomatoes in a container last year, what CANNOT be grown in that container this year? I’ve read about crop rotation but can’t find this answer anywhere. Hope you can help me.” Question from Debbie of Hoquiam, Washington
Answer: You cannot plant a tomato in that pot unless you refresh its potting soil. Tomatoes are rife with soil-borne diseases that can carry over from year to year, so it is better to be safe than sorry. (Click here to learn more about tomato diseases and disease-resistant tomato varieties.) If you opt for rotation, tomatoes should be rotated on a three-year cycle–tomato one year and other vegetables the next two years. (Either way, the potting soil should be refreshed every one to two years.) Good vegetables to rotate in after tomatoes include beans and peas because they naturally fortify soils with nitrogen, and greens, because they are not too demanding.
I encourage you to read my article about vegetable rotation titled Spring to Fall Vegetable Rotation: Planting for Non-stop Garden Produce. It will provide all of the information you will need to effectively rotate your crops, whether container- or garden-grown. You might also like to watch the video below about successfully growing tomatoes in containers.
Happy potted tomato growing!
Black Gold Horticulturist