@prettydarkthing
Yes mason jars are designed for canning they can handle the heat. But honestly I don't do the boiling water thing. I do wash my dishes with very hot water and that works just fine, never had any mould problems. They key with sprouting is to rinse the seeds. Once you do it at least 1x a day and let them drain well, no mould. I don't always use mason jars either I upcycle glass pasta or jam jars. I also get glass jars from the dollar store. They all work well. Here is my current line up:
broccoli, mustard x2, fenugreek, sandwich mix
Some jars mouths are tiny or huge and I cant get/make sprouting lids. For those I just buy cheesecloth from the dollarstore and just cut enough to cover the top leaving an inch of overhang. Like this:
I just secure it with a cheap elastic hairtie (dollarstore ones work great) For big seeds like mung beans/lentils/chickpeas you can sprout them in a colander.
I like this guys method for mung beans (I use a regular colander and a bowl):
You can also sprout in a bowl, plate, even a kitchen towel. Western people act like its a new thing but folks in the eastern hemisphere been doing this for eons. Its a normal part of their traditional diets:
As for the seeds, most health stores and sites selling seeds for sprouting work well. I'm in Canada and buy mine otg from a local healthstore I like the brand "Mum's" just because its Canadian, organic and they source the seeds locally in my region. I also buy from bulk food stores, amzn, etc.
A good one to start off with is "sandwich mix" which is the most common and familiar that you see in the supermarket (alfalfa, radish, clover and mustard).
I also get broccoli and sometimes kale seeds athough the kale I do more of a microgreen (more on that later). I also buy seeds from international markets: I like fenugreek, mustard, mung beans. These are usually good quality and much cheaper than the health stores. (Warning! Mustard is spicy!
If you like wasabi, you will love mustard sprouts)
I love sprouting. I first learned about it about 15 years ago experimenting with raw veganism. I did that on an off for many years and I always felt better eating this way, especially when I ate a large amount of sprouted greens. My most recent stint was 18 months of raw when my hair was falling out about 2+ years ago. That saved me and my hair. You really feel the difference, and I could see how much faster my nails and hair grew. The taste is wonderful, and so much more nutrient density than fully gown greens especially the ones that have been sitting in the supermarket. Its also much more cost effective in the long run. I don't buy much salad greens from the supermarket, except in winter when I can't grow outside/get from my farmers market.
The hardest thing with sprouting as with anything worthwhile, is consistency. The sprouts take anywhere between 2 days- week to grow so you have to plan ahead so you don't run out. Usually every 5 to 7 days works. And like I said before remembering to rinse the seeds and letting them drain. Lean the jars at at an angle upside down, you can do in a bowl or the kitchen sink; I do mine on a wire shelf like this:
Doesn't have to be 4x a day like some people recommend at least 1x. 2x is ideal. But once you work it into your routine its pretty easy.
Long post sorry but I love sprouting