Cistus x platysephalus

Cistus x platysephalus

Excellent performance- including superior cold hardiness and incredibly floriferous is why we grow this moderately large spreading Rockrose. Grass green linear foliage in dense and always fresh on an upright and spreading shrub. Grows in tiers which is pretty and displays the copious single white flowers well. Flowers appear daily from May to July. To 3′ x 5′ and low and spreading initially then lifting itself up gradually. Excellent cold hardiness. We’ve tried many, many Cistus planted out at our Wholesale Nursery site in Wilsonville- at least one zone colder than the city of Portland. This carefree shrub has sailed through 5ºF multiple times with NO DAMAGE and thrives in clay soil on a hillside with absolutely no summer water. As with all Cistus avoid overly enriched soil and too much summer water. Neglect is this tough shrubs friend. Moderate deer resistance. This is confused in the trade and may also show up from time to time as ‘White Gem’- its not.

 

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Cistus x pulverulentus 'Sunset'

Cistus x pulverulentus ‘Sunset’

Compact low growing Rockrose with spectacular hot magenta flowers from May to July and sporadically after that. The large flowers (3″) cover the handsome felted light green foliage. To 2′ x 3′ in 6 years- wider with time. Full sun and poor to average well drained soil. Light to little summer water. Hardier to cold and more compact if you avoid rich soil. Tough little evergreen plant. Protected locations like a hot south facing hillside are ideal. Scattered flowers in late summer to early autumn.

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Halimiocistus x wintonensis

Clever llttle rockrose that deserves a place in a protected, hot, sunny aspect. Sage green dense foliage is a great backdrop to the spectacular 3″ wide cupped flowers. They are white with a zone of maroon at the base around a yellow center. Fun! Blooms daily for 4 weeks in May-June. To 2′ x 2′ quickly in RICH well drained soil in full sun. Light summer water. Great performance in the reflected heat of hellstrips. Beautiful in bloom. Combine with native hardy annuals for a wonderful wildflower spring display. No water necessary. Forms a rounded shape. Best with occasional summer soaks but tolerates drought..  Moderate deer resistance. Very good performance at the Oregon coast.

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Halimiocistus x wintonensis ‘Merrist Wood Cream’

For flowers alone this is the most spectacular Rockrose. A cross between Halium and Cistus produced this remarkable low spreading evergreen shrub to 2′ tall and 3′ wide. In April to June 2″ cream colored single flowers, the base of each petal is a maroon blotch Flowers appear daily for weeks. Attractive felted sage green/gray foliage is handsome even out of bloom.  Full sun and well drained ENRICHED soil- these hybrids prefer richer conditions.  Little or no water for established plants. Tip prune after flowering to shape. Protected location. Excellent performance in Hell strips. Amazing flowers.

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Halimium ‘Sarah’

The very best cultivar of Halimiums as judged by quantity and length of bloom. Golden yellow silky flowers have a deep maroon blotch at the base of each petal. Evergray, rounded shrub to 3′ x3′ in 5 years. Full sun and poor to average, well drained soil. Light summer water to establish then light water.. Blooms for an extended period from early May to early July. Prune after flowering to encourage a denser form and more flowering wood. Excellent wildflower display that pairs well with blue flowered plants. Ceanothus thyrsiflorus ‘Victoria’ flowers simultaneously and appreciates the same cultural conditions. Moderate deer resistance. Average lifespan 6-8 years.

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Halimium ‘Susan’

A very compact form of golden rockrose that is also an insanely heavy blooming machine. To barely 2′ tall and as wide in 5 years. Evergrey foliage is obscured in late spring to early summer with masses of daily golden flowers with a black center. Awesome wildflower effect that lasts for weeks. Full sun and average to poor well drained soil. Water to establish then no water or light water. Longer lived with neglect. Rock gardens, Hellstrips, etc.

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Halimium lasianthum ‘Sandling’

Gray spreading upright evergreen shrub that celebrates late spring into summer with profuse 2″ wide bright yellow silky flowers with a conspicuous tomato red blotch at the base of each petal. Each flower lasts but a day but there is such a profusion of blooms  waiting in the wings that they occur daily for 4-6 weeks from May to July. To 3′ tall and 4′ wide quickly in poor to average well drained soil. Water to establish then water lightly and infrequently during summer. Excellent performance in Hellstrips. Blooms simultaneously with Ceanothus ‘Victoria’ the blue and yellow blossoms a classic combination and both shrubs appreciate the same culture. Cold hardy to 5ºF.

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Halimium lasianthum ssp. formosum

Big spreading Halimium with arching furry gray stems lined with furry gray foliage. In May-July profuse 1″ wide silky yellow flowers with a basal blotch of deep brown appear massively each day. During the heaviest of bloom the foliage is completely obscured. Flowers last until about 4:00 pm and then the petals drop dramatically all at the same time. Full sun and average to poor soil with little summer water once established. One of the hardiest and easiest to grow. To 3′ x 6′ in just a few years. Very drought tolerant. Tolerates clay soils on a slope. Moderate deer resistance.

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Halimium ocymoides

Golden rockrose (Halmium)  is the other genus apart from Cistus. This dense rounded shrub to 2′ x 3′ is clad in evergray foliage and appreciates average, well drained soil in full, all day sun. Water to establish then only light occasional summer water. Blooms which are bright yellow and silky have a central zone of burgundy. One of the common monikers is ‘Black Eyed Susan Shrub’. Produces a great wildflower display for weeks in May to July. Lifespan is about 5-7 years but flowering is so profuse and long the risk is worth it. Cold hardy to 5ºF. Mediterranean native. Plant with Cistus, Grevilleas, Arctostaphylos, Pacific Coast Iris. Prune lightly after blooming has ended to shape, encourage a denser habit.

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Halimium x pauanum

Nice, upright golden rockrose with felted gray foliage and masses of flowers from May-July. To 3′ x 3′ in full sun and well drained soil of average fertility. Little to no summer water once established. The simple, silky, egg yolk yellow flowers shine for most of the day before dropping in late afternoon. They drop all at once- which is kind of cool. A massive new set of buds will be waiting for daily displays for weeks. Good cold hardiness unless soil in too enriched. Grow this baby mean and lean and you get better performance, a longer lifespan, and better cold hardiness. Hell strips, dry borders, gravel gardens. Light deer resistance. Average lifespan 5-7 years- longer with neglect. Prune after flowering has ended if needed. Excellent shrub for a new garden while you wait for focal plants to establish.

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