chart comparison

Drop Seeder—Trays & Plates Compatibility Chart

How to pick drop seeder top trays and bottom plates by hole size and pattern, with recommended hole sizes for common crops.
By Hensley’s Seed Co.

Drop Seeder—Trays & Plates Compatibility Charts

The drop seeder ships with a bottom plate and top tray already installed. That pairing has 3 mm holes and sows in a 72-cell soil-block pattern.

  • To switch seed size but keep the same pattern, swap only the top tray.
  • To switch to a different pattern, swap both the bottom plate and the top tray.

Use the tables below to match the right top tray and bottom plate to your needs.

Drop seeder tray and plate compatibility
Hole size 2.5 mm 3 mm 3.5 mm 4.5 mm 6 mm
For soil blocks 50-cell Top tray 50-cell top tray 50-cell top tray 50-cell top tray 50-cell top tray
Bottom plate 50-cell bottom plate 50-cell bottom plate 50-cell bottom plate 50-cell bottom plate 50-cell bottom plate
72-cell Top tray 72-cell top tray (comes installed) 72-cell top tray 72-cell top tray 72-cell top tray
Bottom plate
(comes installed)
For plug trays 50-cell Top tray 50-cell plug top tray 50-cell plug top tray 50-cell plug top tray 50-cell plug top tray
Bottom plate 50-cell plug bottom plate 50-cell plug bottom plate 50-cell plug bottom plate 50-cell plug bottom plate 50-cell plug bottom plate
72-cell Top tray 72-cell plug top tray 72-cell plug top tray 72-cell plug top tray 72-cell plug top tray
Bottom plate 72-cell plug bottom plate 72-cell plug bottom plate 72-cell plug bottom plate 72-cell plug bottom plate 72-cell plug bottom plate


Suggested hole size by crop.
Hole size (mm) Suggested crops
2.5 mm Arugula, basil, kohlrabi, leeks, mustard, pac choi, parsley
3 mm Dill, onion, shallot, turnip
3.5 mm Brussels sprouts, radish, #12.5 pelleted seed
4.5 mm Daikon radish, spinach, #13 pelleted seed
6 mm Beets, chard, cilantro, leaf fennel, orlaya, sweet pea, Salanova®

Source and attribution

Migrated library resource. Original named people, organizations, research, and factual provenance are retained.