I started a hundred or so peppers this morning and realized a tray I saw once would make it go much faster. The tray I'm remembering was the usual depth, but had long rows instead of cells. Does anyone know what these are called? I've had no luck finding them.

Seedling starter trays.
I just picked up a couple yesterday. Each tray has 72 small compartments in which I am starting my tomatoes, peppers and petunias. I anticipate moving them up in 3-4 weeks into individual pots.
Any nursery or big box store should have them. I got mine at Home Depot.

Are you talking about something like this?:
https://www.harrisseeds.com/pr...

I've got a 3-row version that I fished out of a dumpster at a nursery. I use them for starting my corn.

But... you can get the same effect just by using a "flat" (https://www.greenhousemegastor...). The downside is the open flat makes it a little harder on the seedlings when you remove them for transplanting. I suppose you could make some dividers out of wood or plastic...

Henderman,
I liked the first try you linked to. I may consider picking one up. I prick out all my seedlings into cells.

Sunshine,
If you are talking about starting seeds and then pricking out into cells, you can pretty much use anything. I like using the containers that blueberries or blackberries come in from the grocer. They make a perfect little greenhouse and have drainage and air holes. I just make a row in the medium and put in the seeds, wait for them to sprout and then prick them into a cell tray.

Why not just start them in the cell trays? That's what I do. Then there is no need to move them at all in til you plant them.

Yeah I hear you. I do that as well. Tried the pricking out for the first time this year. I guess what I like about it is you have the ability to pick the strongest seedlings and there's no guessing if the seed is going to sprout in the cell because it sprouts in the tray and then you move it. Haven't lost a pricked transplant. I enjoy it. Works for me.

Henderman, that's it exactly, thank you so much.

I have a bunch of the 72-cell trays, but I haven't used them in a few years because of time constraints. It's easier to start seeds as a batch and pull the strongest seedlings. What I'm trying to solve with the row cell trays is how entangled roots get if I'm a few days late getting to them.

Also, I plant in rows anyway so I can guesstimate germination rate.

SummerStorm93, I have seen these row trays used by a few well respected vegetable gardeners on YouTube. It was amazing how fast it made replanting. (The soil they used was light and loose.) After removing the seedlings from the row. They could very quickly and easily separate the seedlings with tweezers starting at the end and replant them. Works great for things like onions and Leeks grown from seed.