“Sprouts are 10 to 30 times more nutritious than the best vegetables because they are baby plants in their prime. At this stage of their growth they have the greatest concentration of nutrients then at any other part in their life. Sprouts are highly digestible and release their nutrients easily due to their delicate cell walls and abundance of enzymes.” —quote from some guy


I buy seeds from Mumm’s Sprouting Seeds: http://sprouting.com/
In general, it’s important to get sprouting seeds vs regular planting seeds.
Sprouting seeds are made to a higher standard—higher germination rate and since they are sold for the purpose of being eating, they must be cleaner.
“I like, big, jars and I can not lie…”
…you can make a lot of sprouts for less work with big jars, but it depends on how much you want to be eating. I’d almost always recommend big jars. You can always keep them in the fridge for about a week and eat away at it slowly.
The ones I have are from Canadian Tire:
https://www.canadiantire.ca/en/search-results.html?q=Bernardin 6 x 1.9L
They’re big 1.9L jars by Bernardin and come in packs of 6 for $22.
They have many other sizes like 1L or 500ml too:
https://www.canadiantire.ca/en/search-results.html?q=canning%20jars
You’ll want to get lids with screens to rinse and drain the jars easily.
Get them for about $2 USD each from aliexpress.com:
https://www.aliexpress.com/item/For-Wide-Mouth-Durable-Lid-Kit-Stainless-Steel-Sprouting-Jar-Curved-Mesh-For-Sprouts-Growing-Healthy/32962343440.html
Assuming you’re practical and lazy like me and want to go with jars…
With either jars or trays, there is the risk that mold will develop. To prevent this, rinse well/often and keeping the temperature around 20C is recommended. Sprouts/microgreens like growing in temperatures that are comfortable to us, but it’s good to keep it around 20C. I tried to grow sunflower shoots, but they didn’t grow so well. I think it was too cold for them; the temperature was about 17 on average at the time. I suspect sunflowers like it a lot warmer. The chances of mould are much higher with trays since it’s harder to rinse them thoroughly.
Some people grow in trays with a growing medium like soil, coconut coir or growing mats. The main purpose of the growing medium is to give the seeds something to latch onto and helps to retain moisture. Not really sure if the seeds pull any additional nutrients from the growing medium or not, if it were soil. I found and tried some sprout trays that allow the seeds to grow on what looks like a rectangle strainer with a second tray of shallow water just beneath and they seemed to grow really long shoots just fine, just from the nutrients stored within the seed. These trays look like the ones in the image above and were purchased from amazon or aliexpress. If you wanted to get extra fancy and try to get the most nutrition with trays with the least amount of hassle… I would stick with the plastic soil-less trays and add an organic fertilizer to the water in the lower tray called Ocean Solution. Apparently, fruits and vegetables that grow in a nutrient rich environment also taste better.
Putting them in the fridge slows down their growth. It’s still ok to give them a rinse once every other day to keep them fresher. They seem to keep well for about a week in the fridge.
Good luck!
–Josh