I mostly do flowers. I have dozens of roses, day lilies, and plant seasonal ones too. For eating stuff I usually mix in a couple of eggplants in among my flowering plants. I have a small garden for veggies and usually do a couple of kinds of peppers there. I used to grow a mater plant but it was taking too much room. One thing I learned is that if you plant marigolds around your mater plants they will repel mater worms, and it works. I still have marigolds with my veggies, even if I don’t have maters.
Roses are my biggie. I struggle with them. I have good soil, but they were looking scraggly even with good fertilization watering and care. Turned out grubs were my problem. Getting that in control, but they are taking time to recover.
I have day lilies all around my roses, and it is nice. I get lots of color with nice flowers and pretty much no extra care. Some can be cut and kept inside for a very long time fresh.
I do some herbs. Those I have in long planter boxes. I learned that some are best contained, like lemon balm. Made the mistake of growing that in garden and it is like a monster weed spreading everywhere. Mint of any kind will do the same.
I have stevia, which tastes like sugar, and spearmint, which together are great in tea. I often chew a leaf of both just because.
I have chives, basil, chamomile, stevia, spearmint, and parsley in my planters. Catnip didn’t work, the cats ate it to the ground.
I have a dark purple lilac that is gorgeous, and honeysuckle, orange and white. Rose of Sharon is nice too, low maintenance.
My neighbor does the 4x4 thing, but frankly he way overdid it, tried to do watermelons, cucumbers, and mush melons in a 4x4. Well, his is a 3x5, but...