We may have seen our last frost, though that's not certain, and it's only one consideration in deciding when to plant tomatoes, peppers and other tender annuals.
Soil temperature is another critical factor.
Soil temperature needs to be at least 50 degrees for several successive days and nights before it's wise to plant warm-season plants, said Kathleen Cue, horticulturist, University of Nebraska-Lincoln.
So far, the soil temperature is running behind that in most of eastern Nebraska and western Iowa, according to the UNL CropWatch program.
A chilled plant can develop sickly roots and take weeks to recover, which means you lose any advantage of early planting.
Warmer weather next week should help to warm the soil, and it's advisable to wait at least another week, if not more.
To monitor soil temperatures, visit the UNL CropWatch site: http://cropwatch.unl.edu/web/cropwatch/cropwatchsoiltemperature.
Here's a short planting guide, courtesy of UNL horticulture professor Paul Read:
OK to plant: Chard, greens, cauliflower, cabbage, brussel sprouts, broccoli, beets.
Wait to plant: Tomatoes, peppers, eggplant, green beans, impatiens, begonias, etc.