Ghoti Ichthus
Pray so they do not serve alone. Ephesians 6:10-20
@MapleLeaf
Vegetable Container Gardening (Dobbs)
Square Foot Gardening (I adapted some of the ideas to grow in containers instead of raised gardens). If conflicting info, I've gone with the Vegetable Container Gardening info.
There's also a huge vegetable, fruit, and herb growing book that I got at a big box store, but I don't remember the title and don't have access to it right now.
The information for companion planting is available free online. The book is disappointing/not worth the money
Since I grow in containers, I'm more concerned about water and sunshine/temperature needs compatibility. I can alays move the containers around to put companion plants next to or above/below one another.
I love Earth Boxes, but haven't tried City Picker. The dollies are life-savers, cuz EB are heavy. Also like stackers, potato pots, strawberry pots, topsy-turvey (many products), and plain ole hanging pots. I like container growing because I can move stuff around, including inside in case of severe weather, extreme heat, cold, dust storm, locusts, etc. I'm considering trying organic unbleached cotton hanging bags and getting away from plastic when stuff starts to wear out. Having at least one large plant dolly with signifcant weight capacity makes moving stuff around a lot easier. A two-wheel utility/box/moving dolly could be used if the shelf thingee is deep enough.
Using a micro drip irrigation system for hanging containers and other non-reservoir containers reduces water usage and saves a lot of labor over time. Even so, a watering wand with an adjustable-angle head eliminates the need for pulleys to raise/lower plants or standing on/moving ladders, etc. Drinking water-safe hose(s) and drinking water-safe pistol-grip nozzle(s).
Plant (lots of) non-GMO pollinator flowers because they attract pollinators to both themselves and the nearby veggies/fruit/herbs
Bigger yields
At least some GMO flowers are contributing to some pollinator deaths/sterility
Ditto some pesticides, herbicides, and some lawn chemicals 
I'm in cold country like you, so starting seeds indoors is important if I don't want to/can't afford to buy plants. The 72 hole seed starting tray and the peat pellets are awesome. Very little mess and no root shock when transplanting. A full-spectrum bulb or gro-light and heater mat are pluses, but not absolutely necessary if you have a warm, sunny area inside
If you need artificial sunlight, cheaper than buying a gro light is getting the bulb and using it in a lamp you already have (or an el-cheapo). LED bulbs cost a little more, but pay for themselves in electricity savings and longevity, and you can get higher watt-equivalents (more lumens) in el-cheapo lamps that seriously limit the wattage of bulbs. I try to buy organic heirloom seeds and plants cuz open pollinated, no GMOs, and no chemicals. Also try to use organic growing methods/natural remedies for any problems. However, if the choice is losing a crop or resorting to a chemical, I'll use the chemical and keep a note so I scrub that produce extra well before using it.
Hopefully, this helps someone, somewhere, sometime . . .
Vegetable Container Gardening (Dobbs)
Square Foot Gardening (I adapted some of the ideas to grow in containers instead of raised gardens). If conflicting info, I've gone with the Vegetable Container Gardening info.
There's also a huge vegetable, fruit, and herb growing book that I got at a big box store, but I don't remember the title and don't have access to it right now.
The information for companion planting is available free online. The book is disappointing/not worth the money

Since I grow in containers, I'm more concerned about water and sunshine/temperature needs compatibility. I can alays move the containers around to put companion plants next to or above/below one another.
I love Earth Boxes, but haven't tried City Picker. The dollies are life-savers, cuz EB are heavy. Also like stackers, potato pots, strawberry pots, topsy-turvey (many products), and plain ole hanging pots. I like container growing because I can move stuff around, including inside in case of severe weather, extreme heat, cold, dust storm, locusts, etc. I'm considering trying organic unbleached cotton hanging bags and getting away from plastic when stuff starts to wear out. Having at least one large plant dolly with signifcant weight capacity makes moving stuff around a lot easier. A two-wheel utility/box/moving dolly could be used if the shelf thingee is deep enough.
Using a micro drip irrigation system for hanging containers and other non-reservoir containers reduces water usage and saves a lot of labor over time. Even so, a watering wand with an adjustable-angle head eliminates the need for pulleys to raise/lower plants or standing on/moving ladders, etc. Drinking water-safe hose(s) and drinking water-safe pistol-grip nozzle(s).
Plant (lots of) non-GMO pollinator flowers because they attract pollinators to both themselves and the nearby veggies/fruit/herbs




I'm in cold country like you, so starting seeds indoors is important if I don't want to/can't afford to buy plants. The 72 hole seed starting tray and the peat pellets are awesome. Very little mess and no root shock when transplanting. A full-spectrum bulb or gro-light and heater mat are pluses, but not absolutely necessary if you have a warm, sunny area inside

Hopefully, this helps someone, somewhere, sometime . . .