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Wild flowers have never been more popular with gardeners. But what is meant by 'wild flower' on a packet of seed to one person may not be the same to another. To help minimise confusion, the RHS has prepared the following guidance based on consultation with the horticultural trade and organisations.
This page does not an attempt to define ‘wild flower’ in the broader botanical or conservation sense but for garden use only.
In the UK gardeners can buy wild flowers as seeds, plants and even turfPlants introduced to the UK prior to 1500 are referred to in technical or scientific literature as archaeophytesSome seed packets labelled as 'wild flower seed' may contain non-native flower species
When used without any additional description or qualification, ‘wild flower’ is taken to mean a plant indigenous to the country or region in which it is being referred to.
It may be argued that ‘wild flower’ could also be applied to naturalised plants as well as native. Naturalised plants are those that have been introduced into the wild through human agency and become established there. Most modern Floras of the UK include such plants. For example, the Californian poppy (Eschscholzia californica), among many other non-native plants, is listed as ‘introduced or naturalised’ in the New Flora of the British Isles (Stace, 2010).
There are some plants which, though introduced, have been naturalised from ancient times up to the discovery of the New World (c. 1500, see definitions). Examples that may be found in many wildflower mixes include corn cockle (Agrostemma githago), common poppy (Papaver rhoeas), night-flowering catchfly (Silene noctiflora), corn marigold (Glebionis segetum) and corn chamomile (Anthemis arvensis).
In the context of garden use and horticulture we recommend that:
The definition of native plants followed here was provided by Pyšek et al. (2004) (see references) and is as follows, “Taxa that have originated in a given area without human involvement or that have arrived there without intentional or unintentional intervention of humans from an area in which they are native.” Stace (2010) is a standard reference against which the native status of plants occurring in the British Isles can be checked.
Plants introduced prior to 1500 are referred to as archaeophytes following the definition provided by Preston et al. (2004) where the concept was introduced and where a comprehensive list of the UK plants that are considered archaeophytes can be found.
The term provenance is used in this guidance to refer to where plants from which the seed was harvested were grown. It is not the same as ‘origin’ which in this context means the original geographic source of the plants which may be many generations back from the most recent harvest.
Archaeophytes in Britain by Christopher D. Preston, David A. Pearman, Allan R. Hall. (2004 Botanical Journal of the Linnean Society 145: 257-294)
Alien plants in checklists and floras: towards better communication between taxonomists and ecologists by Pyšek, P., Richardson, D. M., Rejmánek, M., Webster, G. L., Williamson, M., Kirschner, J. (2004 Taxon 53 (1): 131-143)
New Flora of the British Isles (3rd edition) by Stace, C. (2010 Cambridge: Cambridge University Press)
Trees and shrubs: native to the UKWildflower meadow: establishmentWildflower meadow: maintenance
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