What sort of containers do you use for potting up seedlings? My husband is a bit concerned about plastic 4” pots, because microplastic. He’s also concerned about paper cups as they are lined with stuff, not actually wax, but like BPAs ? I don’t really have money or desire to buy tons of ceramic pots. Is there something I’m missing? This is my first opportunity to get a garden going in like 20 years, so I very well could be missing something. Thanks
Dammit, I accidentally hit post without saying anything. Okay so!
I reuse plastic seedling trays. I also save and use yogurt/sour cream/etc containers. Some are just regular ones and they fall apart over time, but others are made to be reusable and a bit sturdier. The way they break doesn't really lend itself to creating microplastics, at least not in use. Obviously in the landfill they're as bad as anything. But in use, they'll split along a seam or tear, and become useless that way, rather than shedding parts. I feel pretty fine with using the sturdier ones. I think I got mine from Epic Gardening.
Another method that I've not done because it requires a fairly costly up front investment for the tool is making soil blocks. Basically you use a metal press to form blocks of specially mixed soil that holds together well enough to use on their own. Looks like this:
If you search for soil blocks, you'll find plenty of information.
There exist pots made out of pressed peat or other biodegradable materials (including cow manure), which you will even find at big box stores, but I am not much of a fan of those. They tend to wick water out of the soil and require much more attention to watering than plastic cells do, for one thing. For another, when you put them in the ground, they do still inhibit the roots for a while before they completely break down, especially if any part of the pot sticks up above soil level, because then the pot will dry out rather than breaking down.
Similarly, you can buy what are called peat pellets. In the store, they look like this:
And when you soak them in water, they expand to look like this:
The fine outer layer you can see is supposedly a biodegradable fabric.
I like peat pellets alright, but they're harder to pot up from if you want to grow, say, tomatoes bigger than they can get in these. They are kinda fun, though, ngl.
People also use cardboard egg cartons, and I've done that, but personally I don't think they provide enough growth space for most plants. Can't beat the price, though.
New idea on the block is seed snails, where you roll up soil in a plastic jelly roll kinda thing. People are mostly using waste plastic for this, like that sheet foam things get shipped in, or used plastic bags. I'll probably cut up feed bags for mine It looks like this:
People are liking them because you can start a lot of seeds in a small space, and yet the roots can grow deeply. I'm interested to try this method for things you want a lot of but don't need to get big before you plant them outside, like onion seedlings.