diff --git a/Elwig/Windows/AreaComAdminWindow.xaml.cs b/Elwig/Windows/AreaComAdminWindow.xaml.cs
index 7f33022..ee3b583 100644
--- a/Elwig/Windows/AreaComAdminWindow.xaml.cs
+++ b/Elwig/Windows/AreaComAdminWindow.xaml.cs
@@ -156,7 +156,7 @@ namespace Elwig.Windows {
             AreaInput.Text = a.Area.ToString();
 
             AreaComTypeInput.SelectedItem = a.AreaComType;
-            WineCultivationInput.SelectedItem = a.WineCult;
+            WineCultivationInput.SelectedItem = a.WineCult ?? WineCultivationInput.Items[0];
 
             CommentInput.Text = a.Comment;
 
@@ -179,7 +179,9 @@ namespace Elwig.Windows {
             await base.OnRenewContext();
             ControlUtils.RenewItemsSource(KgInput, await Context.WbKgs.Select(k => k.AtKg).OrderBy(k => k.Name).ToListAsync(), i => (i as AT_Kg)?.KgNr);
             ControlUtils.RenewItemsSource(AreaComTypeInput, await Context.AreaCommitmentTypes.OrderBy(v => v.VtrgId).ToListAsync(), i => (i as AreaComType)?.VtrgId);
-            ControlUtils.RenewItemsSource(WineCultivationInput, await Context.WineCultivations.OrderBy(c => c.Name).ToListAsync(), i => (i as WineCult)?.CultId);
+            var cultList = await Context.WineCultivations.OrderBy(c => c.Name).Cast<object>().ToListAsync();
+            cultList.Insert(0, new NullItem());
+            ControlUtils.RenewItemsSource(WineCultivationInput, cultList, i => (i as WineCult)?.CultId);
             await RefreshAreaCommitmentList();
         }