P?p?hau , the Hawaiian name for a hydrangea , literally mean "snowball .. Overall the mood is too affectionate and soft for all hydrangea species , except for the bigleaf hydrangea ( Hydrangea macrophylla ) . In the cooler volcanic highlands of Hawai’i , from 2,000 to 5,000 feet , this mintage grows and bloom year round , with stems reaching 8 feet in stature .

Climate of Hawai’i

The Hawaiian island enjoy a tropic climate , however higher aggrandizement create a slightly cooler climate that can meet the cool dormancy requirements of several temperate - zoned plants . In the coastal plains , the growing time of year is yr pear-shaped , with highschool in the 80 to 85 academic degree Fahrenheit range , with lows in the 60 degree range . The high , aslant EL also have a year round growing time of year , with high-pitched temp from 65 to 80 degree and Sir David Alexander Cecil Low in the middle 40 .

Hydrangea Growing Requirements

All hydrangea metal money are aboriginal to region of the humankind with cool to insensate winters . Without this annual dormancy of blue temperatures , hydrangea plant slowly reject and reduce or cease flowering .

Overall , the hydrangea plant needs full sun to partial shade vulnerability in a moist , well - draining territory that is rich in constituent matter . In hot summer climates , more tint is demand to foreclose foliage and flowers from scalding or browning .

Hydrangeas for Highland Hawai’i

Only bigleaf hydrangea ( Hydrangea macrophylla ) , native to Japan , is appropriate for civilisation in highland Hawai’i , at raising between 2000 and 5000 feet . On the acidulous volcanic - slopes , the soil ’s pH scale will cause the long - durable , summertime flowers to be shades of blue . Blue - lavender flowers hap when soils are slenderly more impersonal ; an alkaline soil will cause flush to turn pink .

Other hydrangea coinage , such as smooth hydrangea ( Hydrangea arborscens ) , peegee hydrangea ( Hydrangea paniculata ) and oakleaf hydrangea ( Hydrangea quercifolia ) are not well - suited to the mild , barely parky wintertime of Hawai’i ’s highland , and will grow for perhaps one or two years before die .

Hydrangeas for Lowland Hawai’i

The spicy summers and strong winters of lowland Hawai’i , from sea grade to about 2000 feet , is not contributive for put up hydrangea culture , even the bigleaf hydrangea . Potted hydrangeas can be grown as an yearly flower to ornament window box , blossom beds or container . Regardless of species of hydrangea grown as a impermanent bedding plant , the deficiency of winter chill prevents any of them from prove and enduring beyond 3 to 6 month .

Seasonal House Plants

In all parts of Hawai’i , any hydrangea squeeze into bloom by florist greenhouse for seasonal gift plants or holiday color can be enjoyed . earn that if used as an indoor house plant or an outdoor bedding or container plant , any hydrangea will degrade with the want of winter cold . Only potted bigleaf hydrangeas can be plant outdoors in the highlands with hopes of the plant flourishing .

References

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