diff --git a/docs/resources/virtual_environment_container.md b/docs/resources/virtual_environment_container.md
index 1ee286d2..fb360ab2 100644
--- a/docs/resources/virtual_environment_container.md
+++ b/docs/resources/virtual_environment_container.md
@@ -127,7 +127,8 @@ output "ubuntu_container_public_key" {
     - `datastore_id` - (Optional) The identifier for the datastore to create the
         disk in (defaults to `local`).
     - `size` - (Optional) The size of the root filesystem in gigabytes (defaults
-        to `4`). Requires `datastore_id` to be set.
+        to `4`). When set to 0 a directory or zfs/btrfs subvolume will be created.
+        Requires `datastore_id` to be set.
 - `initialization` - (Optional) The initialization configuration.
     - `dns` - (Optional) The DNS configuration.
         - `domain` - (Optional) The DNS search domain.
diff --git a/proxmoxtf/resource/container/container.go b/proxmoxtf/resource/container/container.go
index 78534981..bd3bc487 100644
--- a/proxmoxtf/resource/container/container.go
+++ b/proxmoxtf/resource/container/container.go
@@ -342,7 +342,7 @@ func Container() *schema.Resource {
 							Optional:         true,
 							ForceNew:         true,
 							Default:          dvDiskSize,
-							ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(1)),
+							ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(0)),
 						},
 					},
 				},