You’re in luck! Either’s fine. Put two inches of organic matter (compost or manure) around coneflowers. That’s all they need—no other fertilizer. But if you use manure, it should be aged enough that it’s brown and crumbly and no longer heating up the soil when you turn or mix it.
You’re in luck! Either’s fine. Put two inches of organic matter (compost or manure) around coneflowers. That’s all they need—no other fertilizer. But if you use manure, it should be aged enough that it’s brown and crumbly and no longer heating up the soil when you turn or mix it.