Geraniums Puns

I'm interested in trying the geranium line of puzzles but dont know much about them. is there a standout best one or one i should avoid? is there a good order for building intuition for the hard ones or is it fine to jump in on one of the bigger ones?

My mother gave me this plant as a housewarming gift in June, and despite my best efforts it is still alive and growing. I don't have much affection for it, but I don't mind sticking it in the ground near the condensation drip to see what it does in west Texas' long growing season.

It has five leggy trunks between 3 and 4 ft long. Some of the undergrowth has turned yellow and fallen off, but the top two-thirds is a healthy green with a lot of new growth. It is taking over my living room, rivaling even the lemongrass with its sprawl.

When we moved into our house, we had six larger geranium bushes along the property line. My with and I both hate geraniums. My wife just doesn’t like them and I have hated them since I worked for a greenhouse in college. I hate their smell, and I hate how their oils made my fingertips dry out and split open.

Recently, I mulched the plants for a hugleculture base layer in some new veggie garden beds, but the roots are already producing new shoots.

I want to plant some edible perennials in the space the geraniums were consuming (maybe some dwarf citrus trees) but I need the permanently murder the geraniums first. I really don’t want roundup etc touching my property. Any ideas on something that will kill plants but not stick around too long?