Flowers
H-L
| Harebell | Resignation |
| Hart's tongue fern | Gossip |
| Heliotrope | Devotion |
| Hellebore | Lying tongues |
| Hemlock | Scandal |
| Hepatica | Confidence |
| Herb Paris | Betrothal |
| Herb Robert | Steadfast devotion |
| Hollyhock | Ambition |
| Honeysuckle | Plighted troth |
| Hyacinth (blue) | Devotion |
| Hyacinth (white) | Admiration |
| Hydrangea | Changeability |
| Iris (purple) | Ardour |
| Ivy | Bonds |
| Jasmine | Elegance |
| Jasmine (cape) | Spring |
| Jonquil | Appeal |
| Loburnum | Neglect |
| Larkspur | Trifling |
| Lavender | Negation |
| Lilac (purple) | First love |
| Lilac (white) | Innocence |
| Lily (tiger) | Passion |
| Lily (white) | Purity |
| Lily of the valley | Maidenly modesty |
| Lobelia (blue) | Dislike |
| Lobelia (white) | Rebuff |
| London pride | Flirtation |
| Loosestrife (purple) | Forgiveness |
| Loosestrife (yellow) | Peace |
| Love in a mist | Uncertainty |
| Love lies bleeding | Broken heart |
| Lupin | Over boldness |
