Green Onions in A-OK Starter Plugs

Passive system in a 10" x 20" flat 

Grow fresh green onions easily in your kitchen. Imagine having fresh produce at your fingertips all year long. Use GRODAN's 1.5" A-OK Starter Plugs as the growing medium. This method is simple and easy to do— just follow the directions below.

Shopping list

  • Package of 1.5" A-OK Starter Plugs
  • 98 Onion sets
  • Lemon juice (or pH Down)
  • 10" x 20" flat with no holes
  • Humidity dome
  • Optional: T5 strip light if growing indoor

Ready to get started?

Onions Step 1
  1. Assemble all your materials. Place the sheet of A-OK Starter Plugs in the 10 x 20 flat. Adjust a couple of gallons of water to a pH of 5.5 by using either lemon juice or pH down. For help on adjusting pH click here. Soak the A-OK’s in the flat, then drain off any excess water. Once prepared, your A-OK Starter Plugs are ready for planting.
Onions Step 2
  1. Use a pen or marker to enlarge the holes in the A-OK plugs for the onion bulbs. When finished, simply place one bulb into each hole. No plant food is needed since the onion greens will utilize the energy in the bulb to provide at least two-three cuttings of greens.
Onions Step 3
  1. You are almost done. After planting all of your bulbs, place the humidity dome on top of the tray. Place your system in a sunny part of the house. If this is not an option, use a T5 grow light and place it in the kitchen so it is convenient to use. You shouldn’t need to add any more water to the system while the dome is on. Once the green onions have sprouted, remove the dome.

What about maintenance?


2 weeks after transplanting green onions into the A-OK plugs.

Add approximately two cups of water every three days to maintain enough moisture for the plants to grow. Keep the A-OK starters moist, but avoid having any standing water in the bottom of the tray. Consider using this system for other plants like basil, garlic greens, and wheatgrass. Any small plant growing for a short period of time will work. And what could be more convenient than growing these in your own kitchen?