I am already getting questions on when to plant in the St.Louis area, so I thought I’d do a little research on the weather averages.
May 1st is my standard answer for best planting date and it seems to stand the test of time. While you can certainly put in tougher plants like pansies, most annuals and more tender plants need the warmer temperatures.
If you look at the graph below, you can see that while the Normal Lows for April are in the 50’s by the end of the month, the Record Lows can be in the 20’s and 30’s. The Climate Graphs for May also show that there are no instances of freezing weather in the last fifty years.
May 1st seems to be a good planting date in this area. If you want to live dangerously you can plant earlier, but I would look at the 10 day forecast to be safe.
Beautify Crestwood 