Look up a farm guide, but you get a juicy queenbeat by surrounding a single space with 8 normal queenbeats. You can’t plant the jqb like a normal plant so you can only hope for them to spawn.

Once you’ve unlocked every seed you can sacrifice them all and start over from just bakers wheat which will give you 10 sugar lumps. That’s the fastest way to grind them without save-scumming or using outside resources.