Plants
- Laburnum watereri 'Vossii'Laburnum x watereri 'Vossii'
- Lace cap hydrangeaHydrangea macrophylla normalis
- Lace cap hydrangea 'Quadricolor'Hydrangea macrophylla var normalis 'Quadricolor'
- Lace Lady TreeRobinia pseudoacacia
- Lacecap Hydrangea 'Tricolor'Hydrangea macrophylla 'Tricolor'
- Lactuca sativa var. capitataLactuca sativa var. capitata
- Lactuca sativa var. foliosaLactuca sativa var. foliosa
- Lactuca sativa var. longifoliaLactuca sativa var. longifolia
- Lady FernAthyrium filix-femina
- Lady Tulip 'Lady Jane'Tulipa clusiana Lady Jane
- Lady's Slipper Large YellowCypripedium parviflorum pubescens
- Ladys MantleAlchemilla vulgaris
- Ladys Slipper orchidCypripedium montanum
- Laelia orchidLaelia anceps
- Lagerstroemia indicaLagerstroemia indica
- Lalea 'Cistula'Tulipa gesneriana
- Lalea 'Madame Lefeber'Tulipa fosteriana 'Madame Lefeber'
- Lalea (Tulip mixed)Tulipa fosteriana
- Lalea (Tulipa Triumph) 'Synaeda Amor'Tulipa Triumph 'Synaeda Amor'
- Lamb's-earStachys byzantina
- Lambs tongue, Lambs ears, 'Silver Carpet'Stachys byzantina 'Silver Carpet'
- Lambs tongue, Lambs ears, Lambs tails 'Big Ears'Stachys byzantina 'Big Ears'
- Lamiastrum galeobdolon (syn. Galeobdolon luteum)Lamiastrum galeobdolon (syn. Galeobdolon luteum)
- Lamium maculatum 'Pink Pewter'Lamium maculatum 'Pink Pewter'
- LantanaLantana Camera
- Lantana camara "Miss Huff"Lantana camara
- Lantana Miss Huff
- Lantern TreeCrinodendron hookerianum
- Lapeirousia cruentaLapeirousia cruenta
- Larch
- Large leaved Evening PrimroseOenothera glaziomana
- Large White PetuniaPetunia axillaris
- Large-flowered OrlayaOrlaya grandiflora
- Large-Flowered Rose 'White Symphony' - ShrubRosa 'White Symphony'
- Large-leaved LimeTilia platyphyllos