Think stakes and concrete reinforcing wire. Heirlooms don't do well when left to droop on the ground. The biggest mistake you can make in the Bay Area is to plant too soon. Gardeners here typically plant tomatoes from mid-April through the end of May, but much is dependent on weather conditions. If nights are still cool and foggy, there's no point in planting yet.
Patience is all when it comes to heirlooms.
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