Fragrance in plants is the quality that excites the nose, creating an even greater interest in plants and adding a new dimension to growing them. However, the purpose of scent in plants is not to attract human admirers but to encourage the presence of pollinating insects.
Nature and scents
Scent plays an important role in attracting insects toto carry out , but it is not the only way in which plants attract pollinators. Subtle variations in petal colour, which we may not even notice, fequently attract specific insects.
But scent is of importance in attracting insects to, and some insects, such as moths, have an acute sense of smell. For instance, some moths can detect Honeysuckle at several hundred yards, and honey bees can detect a wide range of odours. In tests it has been shown that they are able to distinguish certain scents from forty or more others. Although colour is an important guide to a flower, it is the scent which is useful in enabling a bee, when flying among many flowers of a similar colour, to alight on the one it wishes to visit. The appeal of a particular scent to a bee is often only temporary, because the bee needs to pass on to the next group of plants in bloom — and is attracted by a different scent as the seasons change.
During warm summer afternoons and evenings, fragrant plants will create an exciting dimension to. The climbers such as Honeysuckle, Jasmine and the Mountain ( montana) are superb for clothing trellises around . And Wisteria brings a rich vanilla aroma. Many climbing or rambling roses soon smother walls with scent and colour, and on a warm south— or west-facing the pineapple-scented Cytisus battandieri creates a wonderful of yellow flowers.
Window-boxes under windows can be made to create a mixture of day and night scents by planting them with a combination of the Night-scented Stock and Virginian Stock. The fragrant Tobacco Plant and the musk-scented Common Mignonette (Reseda odorata) will also help to drench the air with rich and delightful scents.
The reproductive parts of many flowers show that the evolution of insects and flowers, especially in those flowers that are a source of honey, must have occurred simultaneously.
As well as scent and colour, the shape of a flower influences the type of insect that pollinates it. Insects such as butterflies and moths, which have long tongues, can reach nectar deep in the tubes of certain flowers — as in Aquilegias for example.
Night flying pollinators are especially attracted by scent. The Moss Campion (Silene acaulis) is visited by butterflies, whereas the highly fragrant night-flowering Bladder Campion (Silene vulgaris) attracts night-flying moths and long-tongued bees. Other sweetly-scented and night-include Night-scented Stocks (Matthioki bicornis), Evening Primroses and Tobacco Plants.
Fragrant plants for indoors and conservatories
- Cape Jasmine ( jasminoides) bears white, waxen flowers with a heavy and sweet scent from mid to late summer.
- (Cyclamen persicum) creates delicate and sweet fragrances from late autumn to early spring.
- Common (Hyacinthus orientalis) has sweet flowers from midwinter to late spring.
- Persian Violet ( affine) has flowers with a Lily-of-the-Valley scent from mid to late summer.
- String of beads ( rowleyanus) is a trailing plant that bears sweetly-scented white flowers from late summer to early winter.
- (Hoya camosa) is a climber with penetratingly sweet flowers from late spring to late summer.
- Miniature Wax Plant (Hoya be/la) I&a miniature climber that bears sweet flowers from spring to late summer.
- When growing roses in tubs always choose a specimen with a rich fragrance.
- ( ) is a climber that reveals strongly sweet flowers from late spring to early autumn.
- Pink Jasmine (Jasminum polyanthum) is a climber with sweet-smelling flowers that blossom from mid-winter through to spring.
Scented plants for window-boxes and tubs
- Wallflowers (Cheiranthus cheiri) have a sweet scent from April to June.
- Sweet William ( barbatus) flowers during June and July.
- Siberian Wallflower
- (Erysimum x allionii) with sweetly-scented flowers from May to July.
- Bulbous (Iris dandordiae) has a honey-like scent. I. Reticulata is violet-scented.
- Grape ( armeniacum) creates a wealth of deep blue flowers during April and May.
- of all kinds are loved for their perfume.
- Sweet Alyssum (Lobularia maritima) has white flowers with a scent like new-mown hay, June to September.
- Night-scented Stocks (Matthiola bicornis) bears dull -coloured flowers with a heavy and sweet bouquet during July and August.
- Ten-week Stocks (Matthiola incana) has clove-scented flowers from July to September.
- Tobacco Plant (Nicotiana) has highly fragrant flowers which bloom throughout the summer.