You might want to try Greenhouse megastore and see if they have anything that would work for you.

Plug flats (what you have there) aren't normally used with trays. They are just dipped to water and then removed and left as is.

But there are some trays made for them - called watering trays or carrying trays - but they aren't inexpensive. Check Novosel Enterprises website and amaplas.com if interested.

Cheaper alternative is one of the Sterlite or Rubbermaid shallow closet storage bins sold at Walmart.

Dave

Thanks for your replies. Dave, just curious...What prevents the potting soil from coming out the bottom as the water drains from the plug flats? When the medium needs follow-up dipping's later it would seem that a little more of the medium would be drained out each time.