You walk into your garden. You see a hoe (ほう), not that type of hoe! A garden hoe. It follows you around, begging you to use it on the dirt. It loves dirt.
Just a little heads up, hoe already in use as a mnemonic for short ほ like in WaniKani / Kanji / 歩
Good job, custom mnemonics are great and so much easier to memorize yet it’s better to keep them all consistent and avoid clashing.
I have found that another great mnemonic is just remembering “man, this is a really stupid mnemonic.” I think the last one I used it for was 写す because that was kinda stretching it but because it was such a stretch that was how I was able to remember it.