I've memorized each of the 2 spawn points for every plant except maybe honey fruit. I had to, as with Ivern they were the quickest way of escaping a angry jungler upset about me taking their red buff. If I'm not running, or I don't think anyone is gonna need a blast plant, I'll hit it. Blue plants I'll use to check the river for the enemy jungler, or the buffs on the other side. That's what they are made for, and they have the massive downside of giving away your location if any enemy is in the range of it. Honey Fruit spawns every 6 minutes, I know this, because I'm always keeping track if I'm jungling, or laning and need to know how long I need to last before I can grab one.
Honestly, they aren't luck, and they can be used to your advantage or used against the enemy. You're in the enemy jungle? Hit the blue plant on your way to the blast cone next to dragon pit. Check to see if the enemy is in your jungle with a blue plant, or use the blast plant to get to Krugs faster. They're not the worst addition to League, not by a long shot.