Landscaping without harmful invasive plants A guide to plants you can use in place of invasive non-natives Supported by: This guide, produced by the wild plant conservation Landscaping charity Plantlife and the Royal Horticultural without Society, can help you choose plants that are less likely to cause problems to the environment harmful should they escape from your planting area. Even the most careful land managers cannot invasive ensure that their plants do not escape and plants establish in nearby habitats (as berries and seeds may be carried away by birds or the wind), so we hope you will fi nd this helpful. A few popular landscaping plants can cause problems for you / your clients and the environment. These are known as
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r Rr Rr RrR Act, it is an offence to plant, or cause to minority of the 70,000 or so plant varieties available, the o evoevoevoevoe damage they can do is extensive and may be irreversible. TT grow in the wild, a number of invasive ©Tr ©Tr ©Tr ©Tr ©T©T non-native plants. Government also has powers to ban the sale of invasive Some invasive non-native plants might be plants. At the time of producing this straightforward for you (or your clients) to keep in booklet there were no sales bans, but check if you can tend to the planted area often, but it is worth checking on the websites An unsuspecting sheep fl ounders in a in the wider countryside, where such management river. Invasive Floating Pennywort can below to fi nd the latest legislation is not feasible, these plants can establish and cause cause water to appear as solid ground. that may be relevant to you: problems for native plants and animals. Trying to Department for Environment get rid of problem plants from natural habitats, Food and Rural Affairs especially sites of nature conservation importance, is www.defra.gov.uk expensive and diffi cult. Often complete eradication Scottish Government of an invasive plant from the wild becomes impossible, www.scotland.gov.uk/invasivespecies and many hundreds of thousands of pounds are spent each year in an effort to limit their spread. These websites provide more information about invasive plants and their management: Other invasive non-native plants will cause problems in their Plantlife amenity setting too, quickly outgrowing their space and www.plantlife.org.uk becoming diffi cult to keep under control. If invasive plants are Royal Horticultural Society used in water features, they can present an additional hazard www.rhs.org.uk as rampant growth can make water appear as solid ground Non-Native Species Secretariat and so be dangerous to unsuspecting children or animals. www.nonnativespecies.org
2 LANDSCAPING WITHOUT HARMFUL INVASIVE PLANTS A PLANTLIFE / RHS GUIDE 3 How to use this guide CONTENTS Our suggested plants are divided into eight sections PAGE Your choice of plant often refl ects what you want to do – for example create Groundcover plants 6 a stunning visual display in a public park, or provide a barrier to discourage Naturalising plants & bulbs 8 use of a certain area. Here we try to suggest non-invasive plants for a Architectural plants 11 variety of different landscaping occasions and cultivation conditions. Shrubs 14 Invasive plants have sometimes been used in the past for those diffi cult areas Climbers / Wall cover 21 of landscaping, like when a bare wall needs to be covered quickly or soil needs to be stabilised. Meanwhile plants for other aspects of landscaping, such as Trees 23 summer bedding, are unlikely to be invasive. This booklet covers those areas Pond & bog garden plants 27 of landscaping where, traditionally, invasive plants have most been used. Plants for wildlife 32 For example, some cotoneasters used for background screening and Cultivation chart & index 36 groundcover are now displaying invasive tendencies in the wild and have been Within each section the recommended plants cover a range of different sites added to Schedule 9 of the Wildlife and Countryside Act. We suggest safer and cultivation requirements. For example, we list shrubs which offer spring or plants you can try instead in the 'Shrubs' and 'Groundcover plants' sections. summer fl owers or stunning autumn colours, shrubs that are good for hedging or providing background structure to your borders, and shrubs for sunny or shady spots.
Although the plants we suggest shouldn’t cause you undue problems, no matter which plants you use, you/your client will KEY TO need to manage your planted areas at regular intervals. Tolerant of Needs sun Needs alkaline Needs acid Needs Needs SYMBOLS shade conditions conditions drier soils wetter soils Please remember that ALL excess plant matter should be / low light levels disposed of responsibly. The Be Plant Wise website has more information about safe disposal of plant matter: Fast Attractive Attractive Fine Bears Background Low Windbreak Provides growing fl owers foliage autumn ornamental structure / barrier shelter/cover www.nonnativespecies.org/beplantwise colours fruit screening / hedge for wildlife
BOG Berries Nectar Needs Needs Submerged Floating Marginal / Bog garden for birds source rich soil poor soil aquatic plant aquatic plant emergent plant Credits aquatic plant Images used under Creative Commons licences (1-7): Attribution 2.0 Generic Symbols under each plant highlight particular conditions the plant Attribution-Share Alike 2.0 Generic Attribution-Noncommercial 2.0 Generic requires (for example, wet, dry, acid or alkaline soils, or full sun). Plants Attribution-No Derivative Works 2.0 Generic able to grow in shade are also indicated. A plant with no symbols is able Attribution-Noncommercial-Share Alike 2.0 Generic to cope with a broad range of conditions. The index at the back of this Attribution-Noncommercial-No Derivative Works 2.0 Generic Attribution-Share Alike 2.1 Spain booklet provides full details of each plant’s cultivation tolerances. Images used under GNU Free Documentation License, Version 1.2 Front cover image © Martin McCarthey-iStockphoto Inside layout design by Andrew Evans
4 LANDSCAPING WITHOUT HARMFUL INVASIVE PLANTS A PLANTLIFE / RHS GUIDE 5 Groundcover plants Groundcover plants Erosion control Calluna vulgaris Bergenia cordifolia & hybrids
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Sarcococca hookeriana var. humilis Crocus chrysanthus Christmas Box Golden Crocus e Low-growing, suckering shrub grown for its glossy, dark Cormous perennial to 5cm with fl owers which can vary in
green, narrow leaves and small but fragrant, pink-tinged colour from pale cream to deep yellow, often with a purplish er gg white fl owers produced in winter. The fl owers are followed suffusion on the exterior. gg Bar
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