7.1 General principles on habitat creation
The following general principles should be applied to development schemes involving habitat creation.
Planning
Location
Identification of nature conservation features: All proposed and existing nature conservation features should be identified on the site plans submitted as part of a planning application. Advice and survey by a professional ecologist may be required. The Sussex Biodiversity Record Centre may also need to be consulted.
Timing
Works: Works should be scheduled to minimise any risk of disturbance to species and habitats and to maximise the successful establishment of new features.
Surveys: Some species and habitats are only available for conservation work at specific times of the year. Such requirements should be factored in during the earliest planning stages of a scheme.
Design
Integration at an early stage: The design of nature conservation enhancements should be integrated from the early planning stage of a scheme. The aim should be to maximise opportunities and minimise impacts.
Linear features: Avoid the fragmentation of linear nature conservation features. These are often important for allowing movement from one area of habitat to another.
Buffer Zones: Buffer areas between new nature conservation features and development may be needed to avoid damaging impacts.
Species
Choice of species: Full details of all species to be planted should be provided for all schemes. Generally, native species guaranteed to be of local provenance must be used especially in open countryside and on the urban fringe sites. In the urban area, non-native species with confirmed nature conservation benefits, for example, pollen and nature rich, may also be appropriate.
Integration: New nature conservation features should integrate with and complement habitats and species already present in the vicinity. Ensure that habitat creation proposals will not lead to damage to existing biodiversity features.
Implementation
Site Preparation
Avoid topsoil: Most semi-natural habitats are adapted to nutrient-poor conditions, so habitat creation schemes should avoid the use of nutrient-rich topsoil. Topsoil will encourage competitive weed species of low conservation value.
Adequate fencing: Sturdy fencing (rather than temporary, plastic fencing or tape) should be used to protect nature conservation features throughout the construction phase including appropriate root protection areas and buffer zones, and in some cases, subsequently. Details of the location, type and means of installation of such fencing should be provided on the plans as part of the submitted planning application.
Site Management
On-site personnel: All on-site personnel should be made aware of any nature conservation features affected and of the conservation measures required. There should be an identified person responsible for overseeing ecological works and their contact details should be made available to the Planning Officer. An ecological clerk of works and/or specialist contractor may be required, particularly for complex or difficult habitat management works.
Plant handling: All plants should be handled and planted in accordance with the relevant clauses in ‘Handling and Establishing Landscape Plants’ Chemical applications should be avoided.
Aftercare
Provision for management: Developments involving new and existing nature conservation features must make provision for their ongoing management.
7.2 Native plants of local provenance and other plants suitable for landscaping schemes in Brighton & Hove
The use of native species of local provenance should be used in all habitat creation schemes unless there is adequate justification provided and accepted as reasonable for using plants from other sources agreed with the council’s ecological adviser.
Proposals using such species must demonstrate at least UK (and preferably local) seed / plant origins, peat and chemical free as possible. Habitat creation schemes nearby designated nature sites, greenspaces, in open countryside, and the urban fringe must use such suitable and appropriate native species of wildlife value as a priority.
Table 7.2 Native plants suitable for landscaping
View Table 7.2 in downloadable Microsoft Excel format.
Section 7.2.1 Ornamental plants of wildlife value (adapted from a list supplied by The Ecology Consultancy)
In inner urban areas within the built-up area boundary, non-native species which attract beneficial wildlife, such as nectar and pollen rich, may also be used if these are justified to be better suited to the development and the local environment. In the urban area of Brighton and Hove a wide range of horticultural plant varieties offer valuable sources of food for wildlife including nectar, seeds, berries and sap.
Others provide nesting or roosting opportunities. Native and ornamental plants should be combined to create ‘near-natural’ diverse and interesting wildlife-friendly plantings.
The lists below are not exhaustive, but merely a selection of the more widely available species. They should not be used in the countryside or the urban fringe, where they may invade and damage semi-natural habitats. Planting of fruit trees as “scattered orchards” should seek to use traditional varieties local to Brighton & Hove.
Trees
- Apple (Malus domestica (several ornamental forms available))
- Cherry (Prunus spp. (but not ornamental flowering cherries))
- Foxglove tree (Paulownia tomentosa)
- Lacebark (Hoheria spp. for example, H.glabrata, H. lyallii)
- Pear (Pyrus spp. for example, Pyrus calleryana 'Chanticleer')
Shrubs (NB Many of the shrub species below will form small trees when mature)
- Barberry (Berberis darwinii, B.thunbergii 'Bagatelle', B. x stenophylla)
- Broom (Genista spp)
- California lilac (Ceanothus arborea / spp)
- Common myrtle (Myrtus communis)
- Hazels (Corylus spp.)
- Hawthorns (Crataegus spp.)
- Holly (IIex (various cultivars –self-pollinating varieties recommended))
- Daisy Bush (Olearia x hastii, O. macrodonta and O. traversii)
- Elderberry (Sambucus ‘Black Lace’)
- Firethorn (Pyracantha spp.)
- Flowering currant (Ribes sanguineum)
- Flowering Quince (Chaenomeles speciosa)
- Gorse (Ulex spp)
- Himalayan honeysuckle (Leycesteria Formosa)
- Japanese quince (Chaenomeles japonica)
- June berry (Amelanchier Canadensis)
- Laurustinus (Viburnum tinus)
- Lavender (Lavandula angustifolia, L. x intermedia)
- Mahonia (Mahonia spp)
- Mock Orange (Philadelphus spp)
- Rock rose (Cistus spp)
- Rosemary (Rosmarinus officinalis)
- Shrubby Veronica Hebe spp. (select varieties with light coloured flowers)
Herbaceous perennials
A wide variety of herbaceous perennials help support wildlife and the list below is only a small selection. The following general rules can also be used to select good wildlife-friendly plantings:
- Plants with 'Single' flowers (those where the stamens are visible) rather than double flowers.
- Most ‘traditional’ herbs Rosemary, Sage, Lavenders, Fennel, alliums (chives)
- Plants with flat-topped umbels or (daisy-like) heads
- Most Mints (dead-nettles, Salvia spp.)
- Carrot family (Umbellifers),
- Cabbage (Crucifers) family
Sterile hybrid flowers - such as Hydrangea hybrids, Busy Lizzie are to be avoided
Good wildlife friendly herbaceous perennials
- Aster (Aster spp)
- Black-eyed Susan (Rudbeckia hirta or R. fulgida)
- Cinquefoil (Potentilla fruticose)
- Echinacea (Echinacea purpurea)
- Escallonia (Escallonia spp)
- Foxglove (Digitalis purpurea varieties, D. lutea, D. x mertonensis)
- French Marigold (Tagetes patula)
- Globe thistle (Echinops ritro)
- Ice plant (Sedum spectabile)
- Purple Verbena (Verbena bonariensis)
- Red valerian (Centranthus rubra)
- Russian Sage (Perovskia atriplicifolia)
- Ice plant (Sedum spectabile)
- Soapwort (Spanoria officinalis)
- Sweet rocket (Hesperis matronalis)
- Teasel (Dipsacus fullonum)
- Tobacco plant (Nicotiana affinis)
Wildlife friendly annuals
- Blue Wax Flower (Cerinthe major ‘purpurascens’)
- Californian Poppy (Eschscholzia californica)
- French Marigold (Tagetes patula. Avoid the double flowered varieties.)
- Poached Egg Plant (Limnanthes douglasii)
- Sunflowers (Helianthus annus)
- Tobacco plant (Nicotiana affinis)
Climbers
- Clematis species (Clematis vitalba, C. armandii, C. alpina, C. montana, C. tangutica)
- Climbing Hydrangea (Hydrangea petiolaris)
- Honeysuckle (Lonicera japonica, L. fragrantissima, L. standishii)
- Ivy (Hedera helix)
- Jasmine (Jasminum officinale)
Section 7.2.2 Terrestrial Species to avoid in landscaping schemes
Any plants listed as Non-native Invasive Species in Schedule 9 of Wildlife and Countryside Act 1981 as amended should not be planted within landscaping schemes. The following terrestrial species have comparatively few benefits for wildlife areas and their use should be avoided in landscaping schemes, without specific justification:
Species not to be used in landscaping schemes
- Buddleia (Buddleia species)
- Cherry Laurel and variegated laurel species (Prunus laurocerasus / Prunus lusitanica Variegata)
- Cotoneasters (Cotoneaster species) #
- Evergreen Oak (Quercus ilex)
- False Castor Oil Plant (Fatsia japonica)
- Japanese Rose (Rosa rugosa)
- Phormium (Phormium species)
- Shrubby honeysuckle (Lonicera nitida)
- Spotted laurel (Aucuba japonica)
- Stags Horn Sumac (Rhus typhinia)
Table 7.3 General principles on planting trees, woodland, hedgerows and scrub
The conservation of existing trees, woodland and hedgerows, and the creation of new native features is encouraged, where this is consistent with other nature conservation objectives.
The following general guidelines should be followed in any development involving the planting and creation of new trees, woodland and hedgerows. Proposals should also conform to BS 5837 ‘Guide for trees in relation to construction’ (see also SPD 6 ‘Trees and Development Sites’).
Planning
Location
Trees too close to buildings and car parks can lead to complaints about leaf-fall, shade and other problems.
Do not plant in locations which could damage other biodiversity features, or which coincide with underground or overhead services.
New hedges, trees and woods are particularly appropriate where they connect or extend existing woodlands and wildlife corridors.
Timing
Bare root trees should be planted during a frost-free period between mid October and early December.
Container-grown trees can be planted throughout the year (avoiding periods of drought and frost), provided adequate provision is made for regular watering.
Design
Trees and shrubs for woodland/scrub habitats should be spaced between 1 to 2 metres apart.
Two-year old, feathered seedlings or transplants should be planted (larger sizes are more expensive, slower to establish have a higher failure rate and are prone to vandalism).
Species
Mixes of native species should be used which reflect local, natural associations.
In inner urban areas, non-native species and varieties (such as Firethorn) may be appropriate if they provide good wildlife habitat (e.g. berries and nesting habitat for birds). These species should definitely not be used where they could spread to nearby semi natural habitat.
Implementation
Preparation
Compacted soils should be deep- ploughed or ‘ripped’ before planting.
Management
Trees should be planted the same day or as soon as possible after delivery.
Roots should be protected from desiccation and frost damage during transit and storage.
Aftercare
Trees may need protection from rabbit damage following planting and should be kept free of weeds 1 metre diameter around each stem. Use mulch for five years following planting.
Each tree should be drenched with 5 litres of water immediately following planting. Thorough and regular watering may also be necessary for the first two seasons, depending on location.
Dead saplings should be replaced for the first 3 years following planting. Thinning should take place when tree branches become interlaced, and growth is suppressed. Wood waste from thinning should be left scattered under the trees to promote woodland floor species. Piles of dead wood should be avoided where they can create a fire risk.
Existing woods may require enhanced management to remove invasive species, manage access, diversify the range of species present, increase light reaching the woodland floor or to promote particularly desirable species.
Table 7.4 Native trees and shrubs suitable for planting in Brighton & Hove
View Table 7.4 in downloadable Microsoft Excel format.
The introduction of native woodland ground flora is one way of enhancing existing, established woodlands. Table 7.2 includes recommended species for woodland floor planting. These should be introduced in discrete blocks within woodlands where light levels are between 10% and 40% of daylight in summer, as plug plants or seed. Woodland seed sowing should be at a high rate (10kg of seed per hectare), whereas plant plugs can be introduced at about 5 plants per m2.
Hedgerow creation and management follows similar principles to those needed for woodland and scrub. Shrub plants for new hedgerows should be selected from the list provided in Table 7.4, planted at 200mm centres in two rows 150-450mm apart. A ‘hedge line’ mulch should be used, and species should be planted in blocks of five, which helps to give the developing hedge a naturalistic appearance. After planting, cut hard back to encourage bushy basal growth.
7.5 General principles on creating flower-rich grassland
Ancient, species-rich grassland cannot be recreated but it is possible to create attractive, flower-rich grassland as part of new developments. Chalk grassland creation is encouraged by the Sussex Chalk Grassland BAP where conditions are suitable. The following general guidelines should be followed:
Planning
Location
Flower-rich grassland should not be located where:
- it will be heavily shaded by trees.
- the soil is rich in nutrients or will be fertilised
Locations suitable for flower-rich grassland are:
- areas of low soil fertility,
- dry slopes with thin soils.
Timing
Sow native, local provenance wildflower seed in autumn (September-November), a month after soil treatments have been completed (see Site Preparation)
Design
Avoid small grass patches. These are expensive to maintain and tend to be of low nature conservation value. Aim to create fewer, larger spaces which can incorporate low- maintenance wildflower areas.
Species
A mix of species should be used which reflect local, natural associations (see Table 7.2).
Plant plugs, not seeds, should be used to diversify existing grassland. They should be planted 50cm apart. Yellow Rattle (Rhinanthus minor); can be seeded into existing grassland where it will reduce grass vigour.
Seed mixes should be used to establish new flower-rich grassland. Recommended seeding rate: 2g of seed/m2,
Cornfield annuals should be used as a ‘nurse crop’.
Implementation
Site Preparation
Nutrient-rich topsoil should be removed or buried before sowing.
Expensive soil improvements, such as drainage, deep ripping and fertiliser treatment are to be avoided.
Work the soil in midsummer to minimise compaction problems when wet. Cultivate to an even tilth (breaking up, raking, harrowing and rolling) and firm surface. Remove large stones (may damage grass cutting equipment).
Sowing wildflower seeds. Scuffle the surface after sowing to incorporate seeds in the surface soil.
Site Management
Flower-rich meadows should be protected from access and from storage of plant and machinery throughout the construction process
Aftercare
New grassland
In the spring of the first year after sowing, roll and then cut to 10cm high and remove clippings. Cut to 10cm about every 2 months thereafter to prevent any species from becoming dominant. Allow a 5 week break in June/July for the cornfield annual nurse crop to flower. In the second year, revert to the cuts described below.
Timing of cutting and cutting frequency have an important influence on the species found in new and existing grasslands. In all cases, cuttings should be removed and no fertilisers should be added at any time.
Spring meadow: Do not cut until late June, then cut to 50mm. Thereafter cut regularly to 100mm. Because spring meadows are cut before the school summer holidays, they can double as ‘kick about’ areas.
Summer meadow: Do not cut between mid May and late August. Regular cutting to 50mm between March and mid May helps to eliminate coarse grasses during their maximum growth period.
Flower-rich grassland should look intentional. Use mown borders, paths, benches, etc to give flower-rich grassland areas a ‘cared for’ appearance.
7.6 Aquatic plant species suitable for planting in Brighton & Hove
There are no permanent, naturally occurring freshwater bodies in Brighton & Hove. However, ‘dew ponds’ have been created on the Downs for centuries and more recently, amenity garden ponds and associated wetland areas have become important for wildlife.
Submerged
- Common Water Crowfoot (Ranunculus aquatilis agg)
- Curled Pondweed (Potamogeton crispus)
- Spiked Water Milfoil (Myriophyllum spicatum)
- Water Violet (Hottonia palustris)
- Hornwort (Ceratophyllum demersum)
Floating
- Yellow Water Lily (Nuphar lutea)
- White Water Lily (Nymphaea alba)
Emergent
- Flowering Rush (Butomus umbellatus)
- Branched Bur-reed (Sparganium erectum)
- Water Plantain (Alisma plantago)
Marginal
- Marsh Marigold (Caltha palustris)
- Brooklime (Veronica beccabunga)
- Bogbean (Menyanthes trifoliata)
- Water Forget-me-not (Myosotis scorpioides)
- Water Mint (Mentha aquatica)
- Reed Sweet Grass (Glyceria maxima)
- Yellow Flag (Iris pseudacorus)
- Purple Loosestrife (Lythrum salicaria)
7.6.1 Invasive aquatic plant species
Aquatic Plants which must NOT be used under any circumstances (very invasive)
- Swamp Stonecrop (Crassula helmsii)
- Parrot’s Feather (Myriophyllum aquaticum)
- Canadian Pondweed (Elodea canadensis)
- Nuttall’s Pondweed (Elodean nuttallii)
- Curly Waterweed (Lagarosiphon major)
- Water Fern (Azolla filiculoides)
- Fringed Water Lily (Nymphoides peltate)
- Marsh Pennywort( Hydrocotyle Ranunculoides)
- Himalayan balsam (Impatiens glandulifera)
7.7 Coastal vegetated shingle
Coastal vegetated shingle is both a national and Sussex BAP habitat. The Sussex BAP specifically includes an action to “take advantage of coastal development to create new shingle areas”. Coastal shingle is an inhospitable environment for plant growth. Plants experience high-temperature stress and desiccation in summer; salt water spray, high winds and substrate movement in winter. The substrate itself is nutrient-poor and with very little organic matter. Many species survive by accumulating substantial underground reserves.
Due to the intensive amenity use of the beaches in Brighton & Hove, very few areas of coastal shingle retain natural vegetation. However, opportunities may arise through landscaping within new coastal developments to integrate new vegetated areas.
Planning
Location
Any site within 100m of the beach (other than cliffs)
Timing
Pot planting should take place in spring (March/April) to give plants time to establish before summer desiccation and winter storms.
Sow seed in the autumn or spring
Design
Aim to vary the substrate, aspect and slope of a site to maximise the variety of shingle species that can successfully establish.
Species
Annuals and short-lived plants can be established from seed. Perennials colonise too slowly and are too susceptible to disturbance when young for seedling establishment. These species require container-grown plants (9cm pots or greater).
Implementation
Site Preparation
New shingle habitats should be profiled to contain about 20% sand to promote seedling establishment. A depth of at least 20cm shingle is required. Organic matter and fertiliser are not required (may attract weed species). Aim for a matrix of areas of different textures to promote the establishment of different species.
Site Management
Ensure vegetated shingle areas are protected from disturbance throughout the construction period.
Aftercare
Add boardwalks and interpretation boards to encourage appreciation of this rare habitat.
Suitable species for new vegetated coastal shingle are:
- Sea Kale (Crambe maritima)
- Sea Holly (Eryngium maritimum)
- Sea Campion (Silene maritima)
- Biting Stonecrop (Sedum acre)
- English Stonecrop (Sedum anglicum)
- Viper’s Bugloss (Echium vulgare)
- Rock Samphire (Crithmum maritimum)
- Yellow-horned Poppy