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WELCOME TO AD HOC PLANTS
     
PENSTEMON Scrophulariaceae
 Penstemon albertinus 9cm...£2.75
From the Northern Rockies of Montana and Alberta and an attractive species for the rock garden, trough or raised bed. Dwarf clumps of ovate, purple-green leaves beneath short stems of pale blue flowers.
Penstemon aridus sold out
 Penstemon azureus 9cm...£2.75
Penstemon carnosus 9cm...£2.75
 Penstemon cinicola 9cm...£2.50
A pleasant small species with glossy, narrow green foliage and whorled heads of several small tubular blue flowers. Eight-inches in flower.
 Penstemon confertus 1ltr...£2.75
An unusual colour amongst penstemons, the tubular flowers are yellow, with protruding tiny black anthers, and are held four inches or so above a compact mat of rich, deep green leaves. A Rocky Mountain native which has proved quite amenable in the UK.
Penstemon eriantherus sold out
Huge flowers of blue-lavender with slightly fuzzy 'beards' of yellow are clustered on six or eight-inch leafy stems.
Penstemon 'Etna' 1ltr...£3.00
A new introduction with lots of bright vermillion red flowers. Remain compact in a sunny position.
 Penstemon 'Firebird' 1ltr...£2.75
( syn P.'Schoenholzeri' ) Numerous narrow tubular flowers of bright red.
 Penstemon fruticosus var scouleri 1ltr...£3.00
A small, low-growing shrubby form making a foot-high shrublet with large baggy flowers of lilac-mauve in early Summer. Sunny spot.
Penstemon gentianoides 9cm...£2.75
 Penstemon glaber sold out
Twelve inch clumps of lance-shaped, bright green leaves, slightly rough-edged and veined, and clusters of mauve-pink trumpet flowers.
Penstemon glaber s.sp brandegei 1ltr...£3.50
A particularly large-flowered variant with huge, gaping-mouthed, sky blue flowers in a compact, one-sided inflorescence. Sunny, sandy soils suit it best.
Penstemon glabrescens 7cm...£2.75
A stunning small species with narrow, dark green linear leaves forming a low-growing shrublet carrying tubby electric blue flowers with marked lips.
 Penstemon grinnellii var. scrophularioides 9cm...£2.75
Basal clumps of toothed, glaucous blue foliage and sturdy flower stems of tubby, inflated violet flowers with paler throats.
 Penstemon hallii 9cm...£2.75
A happy, easy-going species for the sunny rock garden or trough; violet-blue trumpets are held in compact heads over narrow, elliptical dark, glossy green leaves.
Penstemon 'Heavenly Blue' 1ltr...£3.00
An excellent free-flowering form with small narrow leaves on fine stems and masses of lovely muve-blue flowers for much of Summer. Deservedly popular.
 Penstemon hirsutus var. pygmaeus 9cm...£2.25
Quite broad, purple-green, evergreen leaves form a tidy clump beneath short stems with compact heads of tubular white flowers, flushed with purple. An easy and floriferous species.
 Penstemon humilis var. humilis 9cm...£3.00
Compact clumps of dark blue-green spatulate leaves with crowded inflorescences of several royal blue flowers with pale violet throats emerging from mauve calyces.
 Penstemon jamesii 9cm...£2.50
A tough species suitable for a large rock garden or sunny herbaceous border. Basal clumps of purple-brown green leaves and many lavender flowers with white throats.
Penstemon kunthii sold out
Long, slender bright green leaves beneath twelve inch stems of soft velvety, dark pink flowers with white-striped throats.
 Penstemon laetus var. sagittatus 9cm...£3.00
Small compact 'sub-shrub' type species with purple-blue tinged foliage and bright blue flowers in six-inch pannicles.
Penstemon leiophyllus 7cm...£2.75
Penstemon linarioides sold out
A compact North American species with branching stems of narrow glaucous green leaves forming a small shrublet with tubular purple-blue flowers in early summer. Gritty, sunny position.
 Penstemon lyallii 1ltr...£2.50
Small, compact bush of soft stems and narrow deep green leaves beneath clusters of good-sized purple flowers.
 Penstemon newberryii 9cm...£3.00
Another from the Sierra Nevada, with lovely glaucous blue-green foliage contrasting very effectively with the numerous wiry stems of bright rose-red flowers. A choice but easily grown species. Sun
Penstemon nitidus sold out
Luminescent tubular blue flowers on dainty small plants. Choice.
Penstemon 'Osprey' 1ltr...£2.75
An excellent form with dense pannicles of large bicoloured flowers of creamy white and rose pink creating a stunning and eye-catching display.
 Penstemon ovatus 9cm...£3.00
Attractive mounds of reddish green, ovate basal leaves beneath stems of large blue flowers. An excellent species for the garden.
 Penstemon parishii sold out
( P. centranthifolius x P. spectabilis ) Seed from the Laguna Mountains, San Diego and likely to be variable - the best having stunning inflated tubular flowers of red-purple on eighteen-inch arching wands.
 Penstemon PC&H 148 9cm...£2.50
A small clump-forming penstemon with fifteen-inch stems carrying flared, tubby white trumpets brushed with lilac-purple inside and on top.
 Penstemon pinifolius 'Compactum' 8cm...£2.75
A dwarf selection forming a diminutive six-inch shrublet with deep green, needle-like leaves and showy, narrow red-orange flowers in short racemes.
Penstemon pinifolius 'Ironman' sold out
Slightly taller in stature but still perfect for the rockery or raised bed, where the linear green foliage provides a good backdrop for the vibrant tangerine flowers.
 Penstemon procerus 'Roy Davidson' 9cm...£2.75
Small flowers of delicious apple blossom pink in rounded heads tiered in dense clumps over flat green spreading rosettes. Gritty soils but not too dry, suit this lovely form best.
 Pentemon purpusii 9cm...2.75
Masses of small, tubular purple blue flowers over low-growing evergreen mats.
Penstemon 'Raven' 1ltr...£2.75
Spikes of large baggy flowers of deep maroon-crimson over compact clumps of pale green foliage.
 Penstemon richardsonii 7cm...£3.00
From a woody crown come several ten-inch slender stems which terminate in panicles of bright violet-pink tubular flowers with distinctive expanded, tubby throats.
Penstemon richardsonii var. dentatus sold out
A dwarf form, no more than six-inches tall, with toothed leaves and sprays of bright lilac-pink flowers. Trough or rock garden.
Penstemon rostriflorus sold out
Low clumps of narrow, deep green leaves and quite tall stems carrying bright scarlet, tubular flowers.
Penstemon 'Rubicundus' 1ltr...£2.75
Penstemon rupicola 'Diamond Lake' 9cm...£2.75
A choice delicate selection with crimson-pink flowers on dense mounds of pale glaucous blue-green foliage. Sun
 Penstemon serrulatus 1ltr...£3.00
An attractive evergreen, leafy stemmed perennial, up to twelve inches, topped by dense whorls of blue-violet tubes, slightly bell-shaped and with paler throats. Makes a floriferous mound in a moist, gravelly loam.
Penstemon speciosus var. kennedyi 7cm...£3.00
Compact form of the species with dense cymes of purple-blue flowers.
Penstemon utahensis sold out
Foot high, attractive glaucous blue foliage in thick tufts and racemes of brilliant carmine pink flowers. A pretty and resilliant species for the sunny rock garden.
Penstemon 'Vesuvius' 1ltr...£3.00
Easy-going, foot-high Penstemon with bright magenta-red flowers in profusion.
 Penstemon virens sold out
The 'Blue Mist' penstemon of the Colorado foothills. Compact mats of narrowly ovate, glossy green leaves and numerous five-inch stems carrying up to a dozen, vibrant lavender-blue flowers.
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