This interactive spreadsheet displays a matrix of 70 specific varieties of CUT-FLOWER crops, their seed characteristics, and Jang JP roller gauge size by millimeters, indicating the best Jang rollers for the particular variety, the roller part numbers, and whether or not the roller when placed on the Jang JP Seeder provides for seed singulation, with a Notes/Comments field. Click on any Johnny's roller part # or specific flower variety part # in this chart to view or purchase. Save the file to your desktop to make your own edits and keep more detailed records of which flower seeding practices work best for you. (See separate sheet for Sunflower variety results.)
A spreadsheet displaying a matrix 48 varieties of sunflowers, indicating best Jang JP rollers for sowing, part numbers, and seeding notes on singulation.
Use this spreadsheet calculator to determine the start and end dates for chilling and estimated bloom dates by tulip variety for forced tulip production.
Download our Overwinter Flower Trials Seeding Date Calculator to determine the best seeding date range in your area for over 25 cut-flower crops detailed in our overwinter trial results.