I have found marigold seeds tend to have consistent germination (80-90%). I start with one seed, and after week I pull the duds and replant, repeating as needed.

Remember to cover up the plant with dirt all the way to the top of the pot- you’ll get more potatoes that way.

Just be careful that you give the bag lots of holes for drainage. Potatoes will rot if they remain water logged. I prefer to grow mine in “potato grow bags” (found on Amazon) as they drain well and can hold a large volume of dirt.

Marine silicone is specifically formulated to be water tight (and safe for aquarium inhabitants). It can be found at specialty salt water aquarium stores.

My neighbor planted lemon balm in her small garden bed- now it’s all lemon balm and has spread around the strata gardens. Anything in the mint family has to be contained, or soon it will be all you have.