diff --git a/README.md b/README.md
index 76d4ab0..66ae1a7 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ Make a group from entities in a lovelace entities card - and fold them away when
 | Name | Type | Default | Description
 | ---- | ---- | ------- | -----------
 | type | string | **Required** | `custom:fold-entity-row`
-| head | string/object | **Required** | The entity or row that should be the header
+| head | entity/object | **Required** | The entity or row that should be the header
 | items | list | none | Entites or rows to put in the fold
 | group_config | object | none | Extra options to put on each item in the list
 | open | boolean | false | Set to true to have the fold opened by default
@@ -43,6 +43,8 @@ entities:
 
 ### Groups will populate the fold automatically
 
+If the head is a group, `items:` will be ignored and the fold will instead be filled with the entities in the group.
+
 ```yaml
 type: entities
 title: Folding groups
@@ -56,4 +58,3 @@ entities:
 ```
 
 ![folding groups](https://user-images.githubusercontent.com/1299821/47855259-5d283c00-dde4-11e8-8405-94c269e53935.png)
-