The Frost Date Planting Plan

Plant on the frost odds: your weather station's 90, 50 and 10 percent dates, each crop held to the date its frost class can take, seedling weeks counted from the day it goes out, and a last sowing date for every crop

GardenStuffs' Planting Calendar takes one last spring frost and one first fall frost and counts every crop from them. But a frost date is a probability: on the average date the chance of a later frost is still 50 percent. The calendar does not know which crops can take a frost, and its succession sowings run on without a last date. The plan carries the calendar through. It swaps the one date for your weather station's 90, 50 and 10 percent dates from NOAA's Climate Normals, holds each tender crop to the 10 percent date, counts seedling weeks back from the day each crop goes out, counts days to maturity from transplanting or from sowing, and works out each crop's last sowing date (Virginia Cooperative Extension's count-back). Worked example, Boulder, Colorado: the calendar's five bean sowings include two that fall after June 30, the last sowing date that still leaves two weeks of picking before the tender deadline; tomatoes sown direct leave one week of picking, and peppers sown direct start ripening 12 days after their deadline. Every date is computed from the calculator's own crop table; Boulder's dates are real NOAA figures and the garden is an example. Every outside fact is quoted from its source (Climate.gov, Purdue, Virginia Tech, Maryland, Oregon State and Georgia extension). Included: 24 printable pages with 7 steps, a frost odds sheet, crop plan sheet, last sowing sheet and season frost log, a reference table for twelve crops, a quickstart, and a personalised sheet worked from the dates and crop you enter in the calculator.

What’s inside

The full contents of The Frost Date Planting Plan: spring planted on the odds, fall counted back from the first frost, and the working pages

Step 1, The Three Dates Rule: a frost date is three dates, the 90, 50 and 10 percent odds, shown for a real weather station

Step 1: three dates, not one: your station's 90, 50 and 10 percent spring and fall frost dates, and the seasons between them
Step 2: the 50 percent date typed into the calculator, every tender plant-out held to the 10 percent date
Step 3: hardy, semi-hardy and tender crops (Purdue's table), and seedling weeks counted back from each plant-out
Step 4: days to maturity counted from transplanting or from sowing, and what sowing a transplant crop direct costs
Step 5: the tender deadline two weeks before the average first frost, and each crop's days to spare
Step 6: the count-back from the first frost to each crop's last sowing date
Step 7: succession sowings two weeks apart that stop on the last sowing date, and a late-summer window for cool crops
Four working pages: frost odds sheet, crop plan sheet, last sowing sheet and season frost log
Reference table for the twelve crops our calculator knows, worked through for Boulder, Colorado
Quickstart, plus a personalised sheet worked from your own frost dates and crop

Plus a second PDF, worked out for you

Run one of the free calculators first and buy from that page, and this sheet is computed from your own figures. Buy from here and the pack still arrives complete — the sheet simply has no numbers of yours to work from yet.

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