I swear by these -
http://www.greenhousemegastore.com/p...ats-hobby-pack
I did a price comparison with 3 other companies for 30 of these trays. Greenhouse Mega Store was the cheapest and order was processed with lightening speed! Seems I had just placed my order and UPS was knocking on my door with the product!
Using without doubling up, I have had them crack a little on the edges but they still lasted me 3 seasons and they are still usable. I now use them in con★★★★★★★★ with these -
http://www.greenhousemegastore.com/p...-trays-inserts. It makes bottom watering easy and strengthens the setup.
I paid $42 plus $7.99 shipping for a total of 30 trays (3 10 packs) Works out to about $1.66 per seed tray.