When to Plant Flower Bulbs:
Southern Pacific Coast
Optimum Planting Time: See Below
USDA Hardiness Zones: 9, 10
Region "O" — Southern Pacific Coast
There are TWO major fall planting seasons for the
Southern Pacific Coast:
Plant Mid-August (or as soon as available) into December
- Bulbs native to Mediterranean and other climates, such as:
- babiana, sparaxis, tritonia, watsonia, bearded iris, ixia, Oxalis purpurea, Scilla
Peruviana, freesias, the small alliums, etc.
Plant Mid-October through late January
- Dutch bulbs including daffodils, dwarf narcissi, ranunculus, Anemone
coronaria, Spanish bluebells, muscari (grape hyacinths), lilies, Dutch
iris.
Many are envious of your glorious year-round weather. But few realize how
great your region is for gardening with flower bulbs! True, many of the bulbs
you plant in fall are different from those planted in the other regions. Classic "spring
bulbs" such as tulips, hyacinths and crocuses will need pre-cooling before planting
in your region and will most likely perform as annuals. (See pre-cooling info
below).
But others - including the big yellow trumpet daffodils, dwarf narcissi,
and iris -- need no special treatment at all and should perennialize or naturalize,
if not heavily watered when bulbs are dormant (after flowering, once leaves
have died back). Some tulips do better than others for you: try Single Lates,
Double Lates, Lily-Flowered, and some of the species types. Local garden centers
are generally reliable for stocking bulbs appropriate to your region.
Special Note: To pre-cool tulips, hyacinths and crocuses, store at
35-45° F, for instance in a refrigerator crisper drawer, for a minimum
of 6 weeks and up to 14+ weeks. It's important to avoid storing bulbs near
ripening fruit, as it gives off ethylene gas which can damage the flower inside
the bulb. Once removed from cool storage, plant bulbs immediately. Once cooled
at least six weeks, bulbs may be planted anytime from November through January
- and regardless of when planted, they will bloom in late February/March.
A Sampling of Flower Bulbs for Perennializing: (return for several years)
A Sampling of Bulbs for Naturalizing: (return & multiply)
Shop for Fall Bulbs
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