For a more detailed approach Organic Gardening has a free download at their Spring Planner site. The download gives you all the information you need to plan and plant your garden. There are how-to tips for tending your vegetable and flower gardens in spring. This guide will help you figure the best times to plant your veggies and flowers—based on the last spring frost date where you live which for Piermont has been May 15. There is also information on spacing your plants and interplanting—putting together certain combinations— which will result in the healthiest garden and maximum yield.
Determining Last & First Frosts for PiermontDobbs Ferry, NY -- directly across from Piermont:
This chart can help determine the chance of a certain temperature occurring in our area on a given date.
For each station, you will see a temperature along with a pile of percentage columns. Here's how it works: The percent column tells you the probability that you will experience that row's temperature on or before that date. So, for example, in the Spring 32° row, if you have "Apr 18" under the 50% column, that means that you have a 50% chance of seeing frost on or before April 18th. Another example. Say in the Fall 24° row, under 90%, you have "Dec 12", then that means that you have a 90% chance of seeing 24 degrees on or before December 12th.