For dedicated gardeners, here are suggestions...

For dedicated gardeners, here are suggestions from the California Assn. of Nurserymen on what to do in the garden this week:

* Divide overcrowded perennials this month.

* For exquisite shade color this spring and summer begin tuberous begonias indoors in moist peatmoss. Do not bury the tops. Plant outside once the frost is past.

* Place three inches of mulch around trees, shrubs and flower beds to keep weeds under control. Keep mulch away from tree trunks, shrubs and stems of bedding plants.

* Plant a grape vine on fence or arbor for shade and sweet fruit this summer.

* Remove old flowers on camellias and azaleas to reduce petal blight.