Williames Seeder – Automatic Seeding Machine



Williames Rotary Drum Seeders have been used by leading nurseries the world over for the past 32 years. Throughout the decades, this automatic seeding machine has been recognized for its unsurpassed control when it comes to accurate, automatic high-speed seeding. Part of the Williames Seeding Line, this reliable piece of equipment can sow any type of seed and all known trays.


  • Seeds multiple trays per hour: 750 trays per hour (ST750), 1000 trays per hour (ST1000), 1500 trays per hour (ST1500), 2000 trays an hour (ST2000) and 2500 trays per hour (ST2500).
  • Conveyor: comes with our standard 2.4 metre conveyor or 4 metre conveyor – or we can extend it to a length of your choice
  • Compatible Tray Types: Adjustable to most known tray types
  • Removable Drums: Readily interchangeable dibber and seed drums for different seed types and tray configurations
  • Dibber Drum: Dibber Drum to make an indentation in the tray cell for seed placement
  • Seed Drum: Large diameter seed drum to enable multi-seed singulation bars for optimal singulation
  • Simple Height Controls: Simple seeder and dibber height control
  • Rotary brush: Powered rotary cleaning brush for dibber drum
  • Seed Drum: Large diameter seed drum to enable multi-seed singulation bars for optimal singulation
  • Accurate seed singulation: Air brushes for accurate singulation on seed drum
  • Concise seed-sowing: Accurate seed placement at your chosen depth and position in tray cell
  • Simple safety features: Safe operation and auto-stop mechanism
  • Fingertip variable-speed control: Integrated mechanical drive to enable variable speed and coordinated timing throughout

So, how does the Williames Seeder work?

The Williames Seeder is an automatic seeding machine designed to seed your seedling trays quickly and accurately. It does this by dibbing a precise hole in your seed trays after which the seeder singulates your seeds with high accuracy thanks to its advanced vacuum technology.

Our standard range includes an ST750, ST1000, ST1500, ST2000 and ST2500 Seeder. In simple terms, the ST stands for ‘seed-tray’ and the number that follows it describes the number of trays that model of seeder can seed an hour. For example, the ST2500 model seeder can seed 2500 trays an hour. That said, these standard models aside, we regularly customise our seeders to suit our customers’ very specific requirements, if needed.

The seed begins its journey in the seeder’s hopper. It is then held on to the drum’s surface via vacuum. The thin, white singulator bars allow air to flow in multiple directions, which enhance singulation. Said singulator bars knock off the seeds into your tray. The seeder’s precise seed placement is due to the consistent, uniform speed of your seeds’ transfer from drum to tray. And what’s more, the high-pressure air cleans every rotation to maintain its consistent, premium performance. 

Seed Drum

automatic seeding machine

The seed drum is the heart of the Williames Seeder. The seed drum is made from a graphite-impregnated self-lubricating plastic. Each drum possesses a pattern of holes suiting the tray being sown.

The tray and hole sizes are stamped on the end of each drum. Our plain seed drums come in two types:

  • Single Pattern Seed Drum: The Single-Pattern Seed Drum has one hole pattern.
  • Twin Pattern Seed Drum: The Twin-Pattern Seed Drum has two hole patterns . Let’s say, for example, you are seeding brassica and coated lettuce. Your Twin Pattern seed Drum will have 0.022″ and 0.040″ hole patterns. This allows you to seed both into one type of tray.

Of course, you might have more than two types of seed to sow. Not a problem. Our automatic seeding machines allow you to easily change over seed drums. Your drums are easily slid on and off the machine’s main spindle, so you can alternate between sowing different seedling trays at will. It’s an automatic seeding machine that allows for flexibility.

How is the Williames Seeder’s accuracy achieved?

  • We ensure the dibbled hole made to place each seed is in exactly the right place (the centre – which the optimal place for seed growth).
  • The operator has great control over the seeding head so that only one seed is placed in each cell (We can achieve multiple low-germinated seeds in each cell if desired).

Williames Volcano Needle Seed Drum

The Williames Volcano Needle Seed Drum picks up the seed on the tips of the needles. This enables air from the singulator bars to bounce off the drum and come in from underneath the seed. Singulator air, therefore, comes in from the top, sides (when there are extra singulator bars fitted), and from underneath, improving the precision by which doubles and multiple seeds can be removed. The Needle Seed Drum is usually used for odd-shaped, pointy seed like raw lettuce and uncoated, raw tomatoes and peppers/capsicums. For more information, check out our page on the Williames Needle Seed Drum


Dibber/Dibbler Drum

automatic seeding machine

The Williames Dibber Drum makes an indentation in the growing media of your tray. This ensures that your tray cells have precisely the correct depth for your seedlings to grow into healthy, vigorous plants. Maintaining correct depth ensures that the seeder automatically places your seed in the centre of the cell. After all, if placed too deep, your seeds will struggle to develop to the surface of your tray. For more information on the Dibber Drum, check out our Dibber page.





As depicted in the below diagram, different dibbing points are selectable based on your preference:





Seed Hole Chart

This table shows the recommended seed drum sizes for various seed types. Below is a guide for choosing the right drum. Interested in one of our seeders and you don’t see your specific seed below? You can send us a sample of your seed to us at 103 Butlers Track, Warragul, Victoria, 3820 and we will test it for free to inform you on what drum you’ll require to sow it.

Ageratum .010” Lettuce [raw] .010” / .015”
Alyssum .010” / .015” Lettuce [coated] .040”
Aster .015” / .022” Lobelia 2 – 6 seeds per cell .010”
Balsam .015” / .022” Lupin .022”
Basil .010” / .015” Mahogany .070”
Begonia (pelleted) .015” Marigold .015” / .030”
Beetroot .022” / .030” Nemesia .010”
Broccoli .015” / .022” Onion 5 – 6 seeds per cell 0.22” / .030”
Brussel Sprouts .022” Pansy .010” / .015”
Cabbage .015” / .022” Parsley .015” / .022”
Calendula .030” Pepper Gum .022”
Campanula .010” Petunia .007” / .010”
Capsicum .015” / .022” Phlox .015”
Carnation .015” Portulaca .010”
Cauliflower .015” Polyanthus .010”
Celosia .010” / .015” Poppy .010”
Celery .010” / .015” Portulaca .010”
Chive .015” / .030” Primula .010”
Chrysanthemum .010” / .015” Pumpkin .080”
Cineraria .010” Ranunculus .015” / .022”
Cockscomb .010” / .015” Salvia .015” / .022”
Coleus .010” Schizanthus .010”
Corn .080” Silver Beet .022” / .030”
Cornflower .022” Snow Pea .022” / .030”
Cosmos .015” / .022” Statice .015”
Cucumber .022” / .050” Snap Dragon .010”
Dahlia .022” Spring Onion 5 – 6 seeds .022” / .030”
Delphinium .015” Stock .010” / .015”
Dianthus .015” Sweet Pea .050”
Egg Plant .015” / .022” Sweet William .010” / .015”
English Daisy .010” Tomato .018” / .022”
Foxglove .010” Verbena .022”
Geranium .015” Viola .010” / .015”
Holly hock .022” Zinnia .010” / .015”
Impatients .010”


Should you have any queries regarding our automatic seeding machine, then please let us know either by calling us on (03) 5623 5755 – or, alternatively, fill in the enquiry form below:

Williames Pty Ltd
ABN 42 004 320 834
103 Butlers Track, Warragul    Vic   3820
tel:        +61(3) 5623 5755
fax:       +61(3) 5623 5165
email:  sales@whti.com.au
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