But why restrict yourself to wild flowers in grass? Very few articles suggest using them in herbaceous borders, or amongst shrubs, but I have been planting them like this for some years now and the results can be terrific. This flower border in the photo was taken 14 months after planting and looks very much like a traditional, English flower border. But there are some differences and those are the wild flowers intermingling with the more usual garden plants.
Purple Loosetrife, Lythrum salicifolium, grows wild in boggy places and by stream edges so seems an unlikely candidate for the border. I have found it to be a great choice which copes well with ordinary soil conditions. In the hot, dry summer we have had this year they have only grown to about half their normal height of 3-4ft but their cerise colour and longevity have still made them a worthy addition. In the photograph above they are the bright pink 'blob' in the centre, growing separately to the surrounding plants.
Here they are being grown as a companion to a bright pink ground cover rose, a combination that I'm not so keen on (even though I did plant them myself). They are a bit too strident and close in colour for my taste but others have stopped and admired them so there they remain.
I have also experimented growing them in containers where, of course, you can easily give them the moister conditions they would naturally prefer. Here, their colour makes them quite an exotic addition to the matching colour petunias, the purple leafed coleus and tropical looking (but hardy) palm.
Another reason for growing wild flowers is that, of course, they are great attractants of the local insects. A clump of the herbaceous St John's Wort, this one is Perfoliate St John's Wort, Hypericum perfoliatum, always are covered, when in flower, with bees and other beneficial, pollinating insects. The flowers are miniature versions of the shrubby Hypericum 'Hidcote' and all the better for being small. In the wild, they grow (as many wild flowers do) quite happily amongst grass and other plants. In the garden, I find they combine well with Wormwood, the tall, shrubby Artemisia.
The pale blue flowers of the Field Scabious, Knautia arvensis, continue for months on end and combine well with most other colours. Growing them in the garden gives you the opportunity to notice them in detail. In the wild, it is less likely that you would see how the outer petals of the flower uncurl before the inner ones. Grow them with exotic looking Icelandic poppies or, like here, with tall, purple, Salvia.
Wild flowers often are generous with their flowering, not only in the quantity of blooms and their exuberance. Sometimes, they offer a 'sport'. The most common variant from the norm is white and this pure white version of scabious was a delightful bonus. I like the way the buds start off a creamy colour.
Recently, I have tried growing Lady'd Bedstraw, Galium verum. It is working quite well and the rather acid yellow looks good with lavender. In fact, this flower is all the better for propping itself up against its neighbours as it is a bit inclined (in an unlady-like way) to sprawl, otherwise.
One word of caution about introducing wild flowers into the garden: sometimes, they like garden conditions just too much. If in doubt, plant a small number of plants in an area where you can control them should they take off. I didn't do this with one of my childhood favourites, Toadflax. It took me three years of painful weeding to extract the final pieces from more delicate plants. I have gone back to admiring it where it belongs - along roadside verges and on waste ground.