The Best Days of May by Moon Phase to Transplant Tomatoes

Time Frame

• The gravitational pull that causes the oceans to move in relation to the moon may also cause moisture in the soil to move upward, encouraging plant growth. Movement in soil moisture is at its peak during a new moon and the week following it. As the moon becomes fuller, the amount of light increases, aiding leaf growth. Plant tomatoes during the second week after a new moon appears, but before the full moon for maximum benefits.

Yearly Calendar

• The dates vary from year to year. Consult a yearly moon calendar for the exact dates. For example, in 2011, the best dates for transplanting tomatoes according to moon gardening were May 9 through May 15.

Considerations

• Tomatoes are warm-season crops that do not tolerate cold temperatures. Planting them too early -- even during the optimal moon phase -- will likely result in crop failure. Plant tomatoes only after the soil is warm and daytime temperatures are above 75 degrees Fahrenheit. Cover tomato plants with plastic cloches or row covers if cold weather threatens.

Growing Conditions

• Give tomatoes proper growing conditions to ensure vigorous growth. Tomatoes need full sun, even moisture and fertile, well-drained soil. Select healthy transplants that stand 6 to 8 inches high. Fertilize them with a starter fertilizer at the time of planting. Follow up with a well-balanced fertilizer after the tomatoes begin producing flowers and fruit.