36mm (72 per flat)
42mm (50 per flat)
50mm (36 per flat)
1 inch = 25.4mm
$13.99 for trays with clear lids/domes already filled with pellets. Trays look like pretty thin plastic in the pics.
$4.99 for above per flat quantities of pellets sold in bags as refills at ferrymorse. Looks like they're straight peat moss. Do you fertilize once the plants have used up their seed food?
The humidity domes can be expensive. Most places want $10-12+ for them. WholesaleGrowersDirect has the 2" tall for $2.95 and the kits I'm putting together come with 7.5" tall. The 2" tall versions are better for germination it seems.
GrowersSupply has then for $2.89
https://www.growerssupply.com/farm/supplies/ProductDisplay?mfPartNumber=109047
Both places have flats for $2-3.
Potting mix recipes including Elliot Coleman's soil block mixes & Jean-Martin Fortier’s “All-Purpose” Mix; https://attra.ncat.org/wp-content/uploads/2019/05/pottingmixes.pdf
I buy the Jiffy 7 Extra Depth pellets from Jung’s. Love. Them. They work in any sort of container, so I don’t have to specifically use 1020 flats.
https://www.jungseed.com/product/J53234/1046
I usually supplement with Jiffy pellets from my local Farm & Fleet if I don’t have enough. (I never have enough!)
Re: Humidity Domes. It’s important to remember that those are just needed until your seeds germinate.
Keeping them on longer can lead to damping off disease due to too much moisture being held in.
I’m not sure what the benefit is with those high domes? Never understood that. Any ideas?