Here are some suggestions from a local gardening magazine (Garden Showcase).
Now is a good time to check your lilac for emerging leaves. When leaves get to thumbnail size it is time to plant peas. This is one of the first reliable indicators that works in most garden zones to signal the beginning of the gardening season. Another use for lilac is in salads. The flowers are edible. If you have a pussy willow then check for catkins. They signal the time to plant broccoli and cabbage. This does not apply to other willows so be careful. When the crocus begin to bloom it is time to plant asparagus, radishes, and celery When the daffodils being to open it is time to plant Spanish onions and potatoes. This applies to common daffodils. When apple leaves begin to open it is time to plant spinach, parsley, scallions, carrots, lettuce, and beets. When the apple leaf is full size it is time for tomatoes. These plant indicators do not work in all climates but they are probably better than using most other methods. Occasionally, the plants are fooled by late frosts and unusual weather. jeff
