diff --git a/timm/optim/optim_factory.py b/timm/optim/optim_factory.py
index 06788d2e..c82fd3d2 100644
--- a/timm/optim/optim_factory.py
+++ b/timm/optim/optim_factory.py
@@ -1,7 +1,7 @@
 """ Optimizer Factory w/ Custom Weight Decay
 Hacked together by / Copyright 2021 Ross Wightman
 """
-import json
+import logging
 from itertools import islice
 from typing import Optional, Callable, Tuple
 
@@ -31,6 +31,8 @@ try:
 except ImportError:
     has_apex = False
 
+_logger = logging.getLogger(__name__)
+
 
 def param_groups_weight_decay(
         model: nn.Module,
@@ -92,6 +94,7 @@ def param_groups_layer_decay(
         no_weight_decay_list: Tuple[str] = (),
         layer_decay: float = .75,
         end_layer_decay: Optional[float] = None,
+        verbose: bool = False,
 ):
     """
     Parameter groups for layer-wise lr decay & weight decay
@@ -142,8 +145,9 @@ def param_groups_layer_decay(
         param_group_names[group_name]["param_names"].append(name)
         param_groups[group_name]["params"].append(param)
 
-    # FIXME temporary output to debug new feature
-    print("parameter groups: \n%s" % json.dumps(param_group_names, indent=2))
+    if verbose:
+        import json
+        _logger.info("parameter groups: \n%s" % json.dumps(param_group_names, indent=2))
 
     return list(param_groups.values())