Annuals

Alyssum
Centaurea
Dianthus
Heliotrope
Lathyrus odoratus

Limnanthes douglasii
Matthiola
Nicotiana
Reseda
Sweet Peas
  

Bulbs

Bluebell
Convallaria majalis (Lily of the Valley)
Cyclamen cyprium & C. pseudibericum
Daffodils
   

Galtonia
Lillium auratum & L. Regale
Tulipa 'Ballerina'
  

Climbers

Clematis armandii, C. montana &
C. rehderiana
Jasminum officinale
Lathrus odoratus
      

Lonicera japonica 'Halliana'
Lonicera pericymenum
Lonicera purpusii 'Winter Beauty'
Wisteria

Herbaceous Perennials

Cosmos atrosanguinens
Euphorbia mellifera
  

Geranium 'Prince of Orange
Salvia elegans 'Scarlet Pineapple' HHP

Shrubs

Abelia chinensis
Abeliophyllum distichum
Berberis stenophylla
Buddleia alternifolia, B. davidii &
B. globosa
Camellia sasanqua
Carpenteria californica
Caryopteris clandonensis (aromatic)
Chimonanthus praecox
Choisya ternata
Clerodendrum trichotomum
Clethra alnifolia
Colletia armata 'Rosea'
Corylopsis species
Cytisus battandieri
Daphne species
Deutzia
Eleagnus commutata & E. ebbingei
Erica lusitanica
Escallonia macrantha
Hamamelis species
Jasmine
Laurus nobilis
Lavendula species

Lonicera fragrantissima, L x purpusii 'Winter Beauty' & L. standishii
Magnolia grandiflora, M. sellata & M. siebolidii
Mahonia species
Myrtus communis
Osmanthus species
Perovskia atriplicifolia
Philadelphus species
Phlomis fruticosa
Pittosporum tobira
Ribes odoratum
Romneya hybrida
Rosa species
Rosmarinus officinalis
Ruta graveolens (aromatic)
Santolina species (aromatic)
Sarcococca confusa (Christmas Box)
Skimmia japonica
Syringa species
Viburnum bondnantense, V. burkwoodi,
V. farreri & V. fragrans
Wisteria sinensis

These lists are by no means exhaustive. If you can think of a plant that needs adding, why not email me and let me know.