Hedera helix Betula jacquemontii Calluna cv.
Helianthemum allium giganteum
Helianthemum cv.
Helianthemum dianthus
Helianthemum nummularium : Benfield brilliant
Helianthemums, V[an]D[usen] Mediterranean Garden
Heliotropium peruvianum
Heritage Garden Lilium group
Hexisea bidentata
Hieracium pilosepala, Lychnis chalcedonica
Hippeastrum sp.
Historical : aerial
Historical : construction, lower lake
Historical : drainage installation
Historical : drainage installation
Historical : Heritage Garden development
Holodiscus discolor
Hoskins Rosa, Pompom de Paris, Lonicera ret.
Hoskins, Rodgersia aesculifolia, Astrantia : Variegata
Hosta fortunei albopieta
Hosta fortunei aureo marginata
Hosta fortunei marginata-alba
Hosta fortunei marginata-alba
Hosta lancifolia : Thomas Hogg
Hosta sieboldianus : Frances Williams
Hosta sieboldii
Hosta tokudama aureo variegata
Hosta undulata univitata
Hostas and [Betula] : birches
Huntleya lucida
Hyacinthus amethystinus
[Hyacynthus] : hyacinths, Prunus 'Akebono'
Hydrangea aspera ssp. aspera
Hydrangea collection
Hydrangea macrophylla (general)
Hydrangea p.g.
Hydrangea x peteolaris
Hydrangeas, pink c.v. is 'La France', VanDusen
Hydrangeas, VanDusen
Ilex : golden king
Ilex : sunburst, NA31349, Kosar
Ilex aquifolium : Dutch
Ilex aquifolium : golden milk maid
Ilex aquifolium cv. 'Pyramidalis'
Ilex aquilfolium : fructu-luteo
Ilex argenteo marginata
Ilex cv., J C Van Tol [?]
Ilex hybrid NA25435 x calina
Ilex opaca
Ilex x. altaclerensis cv. wilsoni