grow my own garden

I want my own garden, but that will have to wait until I have my own house and land. I’m growing this weird, flat cactus thing which has grown monstrously huge since I got a cutting of it from my friend’s garden, and I got a night-blooming jasmine plant for my birthday a few months ago. They’re outgrowing their pots and the jasmine tends to grow some kind of weird whitish fungus-like thing on its outermost branches if they grow past a certain length. I should look into that. Also, my parents suck at taking care of plants so I decided to take over two pots of flowers they were growing.