phenology: planting when you see other stuff growing

-Plant peppers, melon, and eggplant outside when bearded iris is in bloom.
-Plant corn when oak leaves are the size of a squirrels' ear.
-When lilac has leafed out plant lettuce, peas, beets, carrots, lettuces and other cool weather varieties.
-When lilac flowers are in full bloom plant beans,cucumbers and squash.
-Direct seed your morning glories when maple trees have full size leaves.
-When you see new growth on green ash, grapes and bur oaks it is safe to plant tender vines, annuals and perennials.
-Plant peas when you hear the first spring peeper.
-Plant tomatoes when lily-of-the-valley are in full bloom.