A free seed starting calculator and a calculator to figure out your garden planting are just two of the free online gardening tools at the Johnny’s Selected Seeds website. Every gardener will find these charts and calculators incredibly useful.
Whether you’re a farmer or a novice home gardener, this calculator will tell you how many transplants or seeds you should plant in each row. You choose the crop and the length of your row, click on “calculate” and voila! The correct number of seeds or transplants you’ll require appears. It also has a second calculator for larger plots and multiple rows.
I absolutely love this one. At the top of the calculator you enter the potential last frost date for your zone – in my case here in zone 6, May 15. The chart then compiles the indoor seed starting date and the “safe” date to set the seedlings in your garden for the most common flowers and vegetables.
This section has a collection of information sheets in pdf form for the most common fruit, vegetables and flowers; a comparison of varieties; disease and pest control and more.
Johnny’s has also added How-to videos, a Fall planting calculator and a few other things you might find useful.