diff --git a/pandas/plotting/_matplotlib/__init__.py b/pandas/plotting/_matplotlib/__init__.py
index f9a692b0559ca..27b1d55fe1bd6 100644
--- a/pandas/plotting/_matplotlib/__init__.py
+++ b/pandas/plotting/_matplotlib/__init__.py
@@ -1,3 +1,5 @@
+from typing import TYPE_CHECKING, Dict, Type
+
 from pandas.plotting._matplotlib.boxplot import (
     BoxPlot,
     boxplot,
@@ -26,7 +28,10 @@
 )
 from pandas.plotting._matplotlib.tools import table
 
-PLOT_CLASSES = {
+if TYPE_CHECKING:
+    from pandas.plotting._matplotlib.core import MPLPlot  # noqa: F401
+
+PLOT_CLASSES: Dict[str, Type["MPLPlot"]] = {
     "line": LinePlot,
     "bar": BarPlot,
     "barh": BarhPlot,
diff --git a/setup.cfg b/setup.cfg
index 1484198929973..9f21aa40f694a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -331,9 +331,6 @@ check_untyped_defs=False
 [mypy-pandas.plotting._matplotlib.misc]
 check_untyped_defs=False
 
-[mypy-pandas.plotting._matplotlib.timeseries]
-check_untyped_defs=False
-
 [mypy-pandas.tseries.holiday]
 check_untyped_defs=False