Seed-Starting & Transplanting

Johnny's Drop Seeder—Trays & Plates Compatibility Charts

The Johnny’s Drop Seeder comes with a pre-installed bottom Plate and with top Tray #9906. This combination has 3mm holes and seeds a 72-cell soil blocker hole pattern.

  • To keep the hole pattern, but change the seed size, replace the top tray.
  • To change the hole pattern, replace both the bottom Plate as well as the top Tray.

Consult the tables below to select the appropriate top Tray and bottom Plate for your needs.

Johnny's Drop Seeder - Trays & Plates Compatibility Chart
Hole Diameter 2.5mm 3mm 3.5mm 4.5mm 6mm
Soil Blocking 50-cell Tray #9902 #9903 #9904 #9905
Conversion Plate #9911 #9911 #9911 #9911 #9911
72-cell Tray #9906 (included) #9907 #9908 #9909
Plate
(included)
Plug Trays 50-cell Tray #9920 #9921 #9922 #9923
Conversion Plate #9918 #9918 #9918 #9918 #9918
72-cell Tray #9924 #9925 #9926 #9927
Conversion Plate #9919 #9919 #9919 #9919 #9919


Recommended hole size for the crop you wish to seed.
Hole Diameter in mm Recommended Crop
2.5 Arugula, Basil, Kohlrabi, Leeks, Mustard, Pac Choi, Parsley
3 Dill, Onion, Shallot, Turnip
3.5 #12.5 Pelleted Seed, Brussels Sprouts, Radish
4.5 #13 Pelleted Seed, Daikon Radish, Spinach
6 Beets, Cilantro, Leaf Fennel, Orlaya, Sweet Pea, Swiss Chard, Salanova®