More than 130 butterfly coinage are bump in Northern California . As delightful to keep an eye on in their natural surroundings as they are in your perennial border , butterfly are worthful as pollinator and are important members of Northern California ’s natural ecosystem . deplorably , some populations are now in decline and have even reached endangered status ; fortunately , it ’s easy and extremely rewarding to create a butterfly sanctuary in your own grounds geared toward ensuring the survival of these elegant , flutter insects .
To promote butterflies to visit , feed , shelter , and linger to lay eggs and hopefully produce a whole novel coevals of “ fly jewels , ” plan on provide summertime - flower ambrosia generator for the adult butterfly , larval boniface industrial plant for the caterpillars to feed and turn on , shelter from tip , sun ( being cold - full-blood creatures , they need sun to warm their wings for flight ) , a water source , and most significantly , a pesticide - gratis environment .
Plant choice is based on height, color, and blossom shape
commence with selecting a salubrious variety of nectar - producing plants for adult butterfly that will provide continuous blooms throughout the summer , set them in full sunshine ( butterflies know a warm , bright environs and provender in sunshine ) with regular wet to keep your plants appropriately hydrous for improved nectar character . pick out plant varieties that will reach different heights , with an array of flower flesh and colors , bearing in judgement that adult butterfly are most active in summertime and choose flat - topped , clustered blooms in tint of low-spirited , red , yellow , orange , and purpleness .
When designing your butterfly garden ’s layout , plant in as natural a mode as potential , imitate nature by mass multiple of your chosen nectar producers together to lessen the space the butterflies need to journey between flowers . Mass planting also increases the esthetic appeal of your garden , create drifts of color and a spectacular summertime display for butterflies and their beholders .
Native plants play a critical role
Many Northern California butterflies and native plants have co - evolved over the centuries and calculate on each other for survival and reproduction , so consider including these native plant in your butterfly garden . Shrubs such asCeanothus California lilac(Ceanothusspp and cvs . , Zones 7–9 ) andmanzanita(Arctostaphylosspp and cvs . , Zones 2–9 ) bloom in late spring , while summer - bloom native perennials such asnarrow - go away milkweed(Asclepias fascicularis , Zones 6–9),California showy milkweed(Asclepias speciosa , Zones 3–9),buckwheat(Eriogonumspp . and cvs . , Zones 4–8 ) , andyarrow(Achilleaspp . and cvs . , Zones 3–9 ) are all high on the list of favorite for many butterfly species . Planting these natives will promote a uninterrupted succession of nectar - seek tiger and Pimpinella anisum swallowtails , monarchs , painted ladies , California calico cat , cerise admirals , and more . Do n’t forget that some indigen also represent as caterpillar “ food for thought ” : milkweeds are larval host plant for monarch cat , and the foliage of both buckwheat and California lilac feed in a variety of butterfly larvae .
Nonnative plants play a role too
Nonnative perennial nectar sources highly democratic with butterflies and Northern California nurseryman alike include‘Irene ’ lantana(Lantana camara‘Irene ’ , Zones 8–10 ) , a picky front-runner . grandiloquent verbena(Verbena bonariensis , Zones 7–11 ) is an excellent ambrosia source as well . If you still have space and want in high spirits - economic value summer - bloom annuals certain to withdraw butterfly , establish a drift of‘Bright Lights ’ cosmos(Cosmos‘Bright Lights ’ ) or an assortment of zinnias .
There are many attractive , nonnative larval hosts to opt from when growing your butterfly garden . Consider adding a‘Coral Seas ’ passionateness flower(Passiflora jamesonii‘Coral Seas ’ , Zones 9–11 ) along a sturdy fence to host gulf checkered lily caterpillar , or a stand of‘The Watchman ’ hollyhock(Alcea roseavar.nigra‘The Watchman ’ , Zones 3–8 ) for painted lady larva . Fennelanddillare ideal for eat anise swallow-tailed coat young . It ’s important to note that the leaves of certain fruit tree — including apples , cherries , and plums — are from time to time rust by the larvae of butterfly stroke you ’ve attracted to your garden . Keep this in mind if you see foliage damage , and correctly place the culprit before count treating your Sir Herbert Beerbohm Tree .
To fill in your butterfly stroke bema , provide a flat , sunlight - swamp rock for butterfly stroke to remain , point themselves , and warm their wings for escape , and create a shallow , consistently moist , arenaceous “ pool ” to dish as a water source . Finally , find a courteous speckle in your garden and then sit back , relax , and delight the show !

Fionuala Campion is the owner and manager of Cottage Gardens of Petaluma in Petaluma , California .
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Anise swallowtail. Photo: Fionuala Campion

Monarch. Photo: Fred Wiman

California lilac. Photo: Fionuala Campion

‘Coral Seas’ passion flower. Photo: Fionuala Campion

Anise swallowtail. Photo: Steve Aitken


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