Preheat oven to 325° F.
Grease and flour a 10-inch Bundt or tube cake pan, or 2 large loaf pans.
Cream butter and sugar with electric mixer until light and fluffy. Add eggs, one at a time, beating well between each addition. Add flour alternately with soda, beating well. Stir in lemon juice, vanilla extract and chopped fresh herb leaves.
Pour batter into prepared cake pan, smoothing top. Bake 1¼ hours or until cake tester comes out clean when inserted into middle.
If necessary to prevent over-browning (ovens vary), place a piece of aluminum foil lightly over the cake toward the end of baking.
After cake is removed from oven, cool for 10 minutes; invert carefully on serving plate to remove cake from pan.
Slice and serve with vanilla custard, lemon curd or other sauce. Garnish with fresh rose geranium leaves.