This Exchange is open to everyone from March1, 2011 until April30, 2011

Seed packets are $2.00 CDN each for hand-pollinated and $1.50 CDN each for open-pollinated seed.  One packet per lot per person. More may be ordered but are subject to availability.
Add $2.00 CDN for postage & padded envelope. Please list substitutes as quantities for some lots are small.
Lot #'s sold out will be designated with a strike through.
All orders must be on the form provided 


Send all orders to:
, #407 Old Maryvale Rd., RR#3 Antigonish, Nova Scotia B2G 2L1 CANADA  
Please make your cheque or money order payable to ‘Atlantic Rhododendron & Horticultural Society’.


US regulations now require an import permit and a phytosanitary certificate. Seeds sent to the US will be shipped without a phytosanitary certificate and at the orderer’s risk.





DONORS:   BIR - Jens Birck, Copenhagen, Denmark   CLY - Bruce Clyburn, New Waterford, NS 

COR - Wendy Cornwall, Halifax, NS   CRA - Donald Craig, Kentville, NS   HEL - Mary Helleiner, Halifax, NS

SHA - Ken Shannik, Halifax, NS   THE - Kristian Theqvist, Finland   WEA - John Weagle, Halifax, NS  

WIL - Bill Wilgenhof, Antigonish, NS   




Rhododendron Species - Hand-Pollinated  - $2.00



001    WEA  R. albrechtii (very dark)

002    WEA  R. camtschaticum, pure pink, large flowers

003    WEA  R. camtschaticum, pink-purple, vigorous form

004    WEA  R. carolinianum (Barbara Hall's best),


005    CRA   R. cumberlandense ‘Top of The Mountain’

                      ex seed collected wild, Georgia at 4,000ft.

* this is the best selection, orange/red, very late flowering

006    THE    R. R. dichroanthum ‘Böhmen1, selfed 17





Rhododendron Species - Open-Pollinated  - $1.50


007    THE    R. ledebourii†2  

008    CRA   R. calendulaceum         

009    CRA   R. cumberlandense ‘Top of the Mountain’

010    WEA  R. oreodoxa ssp. fargesii (Bayport best)

                      should come true, isolated and reluctant to


011    WEA  R. kiusianum, mixed selections light pink, dark

                      pink, purple, lavender, red/orange, white.

                      Fairly isolated so a high percentage will be

                      kiusianum itself

012    WEA  R. maximum (Boulderwood red leaf)

013    WIL    R. maximum, pinker form

014    WEA  R. minus, Carolinianum Group, Bayport robust

                      ex Jackson’s, isolated so should come true.

015    WEA  R. minus x R. carolinianum (‘Mincar’)

016    WIL    R. minus Carolinianum Group, pink

017    WEA  R. mucronulatum v. taquetii Dwarf purple,

                      Expect about 40% true

018    WIL    R. mucronulatum, pink

019    WIL    R. mucronulatum, white form

020    SHA   R. schlippenbachii, good pink form

021    SHA   R. vaseyi - pink, doesn’t cross with other


022    SHA   R. vaseyi ‘White Find’, doesn’t cross with other




Rhododendron Hybrids - Hand-Pollinated -$2.00


023    BIR     R. aureum (Doi)   x R.macabeanum

024    BIR     R. aureum (Doi) x ‘Nancy Steele’ †3

025    CLY    ‘Augie Kehr’ x ‘Nancy Steele

026    BIR     R. brachycarpum v. roseum (Doi) x           

                      R. citriniflorum v. horaeum

027    CLY    ‘Catalgla’ x [(yak x lacteum) x ‘Powder


028    BIR     ‘Charme-La’ x R. cinnabarinum Roylei Group

029    BIR     ‘Charme-La’ x ‘Biskra

030    LOO    {‘China Boy’ x [‘Nova Zembla’ x (‘America’ x

                      ‘Mars’)]} X ‘Fireman Jeff’

031    LOO    ‘Cindy Lou’ (Delp) F2 x ‘Fireman Jeff’ 4

032    THE    ‘Eino’4 x ‘Burgundula’  6  18

033    CLY    ‘Golden Sceptor’ x ‘Nancy Steele’

034    THE    ‘Hellikki’7 x ‘Goldprinz’  8 

035    THE    ‘Hellikki’ x ‘Matador’ 9 

036    THE    ‘Hellikki’ x R. ochraceum 

037    THE    ‘Helsinki University’ 10 x ‘Christian’ 11

038    THE    ‘Helsinki University’ x R. fortunei ‘Best Form’ 12               

039    THE    ‘Mikkeli’ 13 x ‘Matador’

040    THE    ‘Mikkeli’ x R. ochraceum

041    THE    ‘Pekka’ 14 x fortunei ‘Best Form’

042    THE    ‘Pekka’ x prattii

043    CLY    R. catawbienese "U.Paim" x Babylon

044    BIR     R. sanguineum ssp. didymium Rock#44 x

                      R. brachycarpum v. roseum (Doi)

045    CLY    ‘Russel Harmon’ x ‘Babylon

046    LOO    ‘Sandra Hinton’ x (R. maximum x R. fortunei)

047    CLY    Steele white R. catawbiense hybrid x [(yak x

                      lacteum) x ‘Powder Snow’]

048    CLY    ‘Vinecrest’ x ‘Nancy Steele’

049    CLY    (‘Whitestone’ x yak) x (yak x lacteum)





Rhododendron Hybrids - Open-Pollinated - $1.50


050    WIL    ‘Peter Tigerstedt’, OP

051    WIL    ‘Red River’, very late red, R. maximum hybrid

052    WIL    seedling from ARS92#608, aka “Ivory Cloud”

053    WIL    seedling from ARS92#765, aka “Ruby Lemon

                      (‘Janet Blair’ x ‘Barbara Cook’)



Azalea Hybrids - Hand-Pollinated - $2.00


054    CLY    ‘Gibraltar’ x ‘Balzac’       (fr.2010)

055    CLY    ‘July Jester15 x (R. cumberlandense x ‘Cream Puff’) (fr.2010)

056    CLY    ‘July Jester’ x (R. cumberlandense x R. luteum)


057    CLY    ‘July Jester’ x R. mollis ssp. japponicum (orange) (fr.2010)



Azalea Hybrids - Open-Pollinated - $1.50


058    WIL    ex ‘Home Bush’, ball-shaped pink trusses Great performer - mid-late blooming

059    WIL    Unnamed azalea seedling from ARHS’01#74

                      (R.arborescens x R.cumberlandense),

                      scarlet/orange, late

060    WIL    Unnamed azalea seedling from ARS2001#539, Late blooming pink, very fragrant

061    WIL    Unnamed seedling from ‘Homebush’ x ‘Mt. St.

                      Helen’s’, raspberry with golden blotch

062    WIL    Unnamed seedling from ‘Homebush’ x

                      unnamed pink, red ball-shaped truss

063    WIL    Unnamed seedling from ‘Homebush’ x

                      unnamed yellow, large peach florets

064    WIL    Unnamed azalea seedling small yellow florets vivid fall foliage (likely luteum mix)

065    WIL    Deciduous azalea, mix - FREE


Companion Plants - Open-Pollinated - $1.50


066    SHA   Aconitum fischeri (a few only) blue flowers in

                        late fall, sturdy - Per

067    SHA   Aconitum japonicum, blue flowers on arching

                        stems in late summer - Per

068    SHA   Actaea spicata, creamy-white fragrant flowers

                      followed by shiny black fruit. Poisonous - Per

069    WIL    Aquilegia sp. ‘Irish Elegance’     White with

                        green splash ~30”  -Per                              

070    SHA   Anemonopsis macrophylla Choice woodlander


071    WEA  Arisaema ciliate, burgundy striped flowers

                        topped by a whorl of narrow leaves

072    SHA   Callicarpa dichotoma, clusters of tiny purple

                        berries in fall  - Shrub 

073    HEL    Caulophyllum thalictroides, Blue Cohosh

                      1-3 Ft. - Per

074    SHA   Cimicifuga racemosa ‘Hillside Black Beauty’

                      (now Actaea racemosum) (Black Snakeroot)

                      Very dark foliage and fragrant white flowers

                      in late summer. 5’(1.5m) - Per

075    SHA   Clematis koreana  - Shrub

076    SHA   Clematis viorna, small, thick, purple-pink

                        urn- shaped flowers Herbaceaous- Per   

077    WEA  Cyclamen hederifoilum (silver-leafed form)


078    SHA   Deinanthe bifida, Blue, 18"(.45m), part shade,

                        hydrangea relative - Per

079    SHA   Deinanthe caerulea - Per

080    WIL    Dictamnus  fraxinella (Gasplant) Pink ~30”

                        Good foliage, handsome seed heads -Per

081    HEL    Disporum flavens, Fairy Bells

          primrose-yellow, pendant blooms on tall, 30-inch stems. Early spring - Per

082    SHA   Diphylleia cymosa Bold foliage plant for moist part shade. Small white flowers

                       followed by dark blue berries held above foliage - Per

083    SHA   Enkianthus campanulatus, ericaceaous shrub, brilliant fall colour - Shrub

084    SHA   Gentiana asclepiadea (WillowGentian) Blue

                        flowers, arching stems ~2Ft -Per

085    SHA   Gentiana asclepiadea ‘Alba’ ~2 Ft - Per

086    HEL    Glaucidium palmatum, Japanese Wood Poppy

                      White poppy-like flowers in spring - Per

087    HEL    Glaucidium palmatum, Japanese Wood Poppy

                      Mauve poppy-like flowers in spring - Per

088    COR    Halesia monticola (Mountain Silverbell)

                      White flowers followed by winged

                      Fruit  - Tree to 30Ft.

089    SHA   Helleborus argutifolius - Per †19

090    SHA   Helleborus foetidusWester Flisk

                      green flowers very early in spring above

                      evergreen foliage - Per  †19

091    WIL    Kalmia latifolia, OP pinks - Shrub

092    WIL    Leucothoe fontaneisiana (Drooping leucothoe)

                      Handsome evergreen shrub, broader than tall

                      Small white flowers in spring - Shrub

093    SHA   Lilium candense, red form - Bulb

094    WIL    Lilium martagon  White drooping recurved blooms, earliest lily - Bulb

095    WEA  Lilium mackliniae Pink, fading to white, ~30"

                        Plant deep, avoid drought - Bulb

096    WIL    Magnolia loebneri hyb. ex.’Leonard Messel’, pink,  mid-sized Tree †17

097    WEA  Magnolia sieboldii ex Korean plant h.p.

                      (selfed) white with pink stamens, vigorous

                - Tree †17

098    WEA  Menzesia ciliicalyx v. purpurea (dwarf form)

                      - Ericaceous shrub

099    WEA  Nomocharis maire Heavily spotted, summer flowering. - Bulb

100    SHA   Ophiopogon planiscapusNigrescens

                      Black Mondo Grass

                      makes a great groundcover or edge plant for the

                      border of a garden  12”+/- (about 75% should come true) - Per

101    SHA   Podophyllum hexandrum

                      (Himalayan Mayapple)- Per

102    SHA   Primula viallii Chinese Pagoda Primrose

                      Produces a stout 1-2’ stalk bearing a mauve-

                      scarlet, rocket-shaped, flower cone. - Per

103    WIL    RudbeckiaPrairie Sun’, golden yellow with

                      green centre 24-30” - Per or Annual

104    SHA   Smilacina racemosa (now Maianthemum

                      racemosum) (a few only) - Per

105    SHA   Stewartia pseudocamellia, noteworthy peeling

                      Bark - Tree

106    SHA   Streptopus roseus (Rosy Twisted Stalk) flowers

                      bell-shaped, with 6 rose or white with purple

                      streaked, recurved petals; early-summer. -Per

107    COR    Styrax japonica  Slow growing, ~ 2.5 metres after 18 years, white bell-shaped flowers in the summer - Shrub

108    WEA  Viburnum betulifolium, spectacular red fruit,

                      appears to be self-fertile - Shrub





†1.           ‘Böhmen’ is pretty hardy and probably a form of dichroanthum ssp. scyphocalyx.

Selfing should give variation as the orange flowered ‘Böhmen’ is a suspected hybrid .       

†2.           R. ledebourii, probably selfed as it flowered   earlier than other lepidotes

†3.           “Nancy Steele’, formerly BPT#80-5, yellow

†4.           ‘Fireman Jeff’ is (‘The Honourable Jean Marie de Montague’ x ‘Grosclaude’)  dark red flowers

†5.           Eino’ is a hardy Finnish hybrid with purple   flowers.

†6.           Burgundula’ is ‘Azurro’ x ‘Blue Boy’, cross by H. Hachmann.

†7.           ‘Hellikki’ is a Finnish red hybrid.

†8.           Goldprinz’ syn. ‘Goldschatz’, good yellow,   (‘Festivo’ x ‘Alice Street’), cross by H. Hachmann.

†9.           ‘Matador’, red flowers, R. griersonianum x    R. strigillosum, cross by Lord Aberconway.

†10.         ‘Helsinki University’ is a super hardy Finnish hybrid with pink flowers.

†11.         ‘Christian’ has large yellow flowers. Parentage ? Grows at Sofiero Castle, Sweden.

†12.         R. fortunei ‘Best Form’, aka ‘German Form’, found from Hobbie Rhododendronpark.           

†13.         Mikkeli’ aka ‘St. Michel’ is a hardy Finnish   hybrid.

†14.         ‘Pekka’ is a hardy Finnish hybrid     

†15.         ‘July Jester’ = (R. prunifoliumS. D. Coleman’ x R. cumberlandense ‘Scarlet Salute’)

†16.         Wash seeds thoroughly in soapy warm water, rinse, soak for 24 hours in lukewarm water, sow ¼" deep.        

†17.         Magnolia seed has been stratified. Store in fridge in plastic packet as received until March/April then sow in warm soil.             

†18.         cp = Controlled Pollination, where stigmas have been protected before and after pollination. All contributions from K. Thequist are c.p.

†19.         Hellebore seed may take 6-18 months (or more) to germinate; however, if you start with fresh seed and sow it soon after harvest, then your chances of achieving high germination percentages are quite good. For example, sowing fresh seed in damp media at room temperature for eight weeks followed by a cool period in the refrigerator for another eight weeks or so will yield good results. We shall try to ship “treated” seed.                





1.       Open-pollinated species, with the exception of a very few, may not come true from seed. Cultivars, with the exception of a few perennials do not come true. Plants from these seeds should be labelled as being “ex” that species or cultivar.

2.      The 2011 Seed List will be posted on the Internet with insertion of images and links to help in your decision-making.

Follow the links for ARHS Seed Exchange.

A link to the list will be inserted on the Atlantic Rhodo site.

3.       Also see the ARHS website for an article on growing rhododendrons from seed.

4.       When sowing rhododendrons on peat we recommend you sterilize it first. Microwave it for 15 minutes or pour boiling water through it several times. Allow to cool.

5.       We would like to thank the seed donors for their time and effort making crosses, collecting and cleaning seeds. We would also like our membership to take note of the types of seeds donated this year. We highly encourage members to attempt their own hybridization of rhododendrons. Seed of uncommon trees, shrubs and perennials is always most welcome.

6.     Here are some useful "homework" links:

American Rhododendron Society

Azalea Society of America

Danish Rhododendron, species

East Coast Native Azaleas

 Rhododendron Species Foundation

Kristian Theqvist, Finland

Hirsutum, Rhododendron Database



Updated by S. Bryson   April  28, 2011