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ESTABLISHING VEGETATION ON A GREEN ROOF /DUJHVWVSHFLDOLVWJURZHU VXSSOLHURIRYHU%ULWLVKQDWLYH ZLOGĂ RZHUVPDUJLQDO DTXDWLFSODQWVDQGVHHG Our experience has shown that a combination of plug planting and seeding (with a specially devised seed carrier) is the most effective way to establish a biodiverse roof. However for a balanced view the pros and ZLWKRYHU\HDUVH[SHULHQFH cons of the different planting methods are described below: Natural Colonisation BritishFlora

T: 01494 718203 ŽŜƚĞŜƚĆ?  WÄ‚Ĺ?Äž Grange Farm F: 01494 718989 It 'ĆŒÄ‚ĹśĹ?ÄžZŽĂĚ is not recommended to allow roofs to colonise naturally as this can take a long time, it relies on ĎŻhaving a Í—Ĺ?ŜĨŽΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ /ĹśĆšĆŒĹ˝ÄšĆľÄ?Ć&#x;ŽŜ good seed source nearby and the bare substrate is likely to become colonized by undesirable weed species Ç Ç Ç Í˜Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ   tĹ?ÄšĹľÄžĆŒŜĚ such as Buddleja. If the green roof is located in or near to an environmentally sensitive area and local dĆŒÄ‚Ç‡^Ĺ?njĞĆ? ϰͲϹ ĆľÄ?ĹŹĹ?ĹśĹ?ŚĂžĆ?ĹšĹ?ĆŒÄž ŽžƉĂŜLJZÄžĹ?EĹ˝Í˜ϰϯϳϲϲϲϾ provenance seed is required, seed should be collected by a specialist contractor such as BritishFlora from a ,WĎ­Ďąϲ ŽžƉĂŜLJsdEĹ˝Í˜ϳώϳϹϾϾϲϳϾ local reserve and grown into plugs for the green roof or seed spread

Ä‚Ć?Äž^ƚƾĚĹ?ÄžĆ? directly onto the roof (See other methods below).

BritishFlora ^ƚĂč͗

Seeding

ŽŜĆ?ƾůƚĂŜÄ?LJ^ÄžĆŒÇ€Ĺ?Ä?ÄžĆ?

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Seeding is a cost effective method to vegetate a green tĹ?ĹŻÄšĹ‡Ĺ˝Ç ÄžĆŒDÄžÄ‚ÄšĹ˝Ç Ďł roof Í—Ĺ?ĆŒÄ‚ĹšÄ‚ĹľÎ›Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ particularly suitable for larger roofs over 1500m2. There is a wide choice of species available from'ĆŒÄžÄžĹśĆŒĹ˝Ĺ˝Ä¨ seed and the installation isϴͲϾ relatively straightforward involving hand broadcasting or over larger areas employing hydro-seeding methods or a mechanical spreader. &Ĺ?ĞůĚ^Ä‚ĹŻÄžĆ?DĂŜĂĹ?ÄžĆŒ Í—ĹśĹ?Ĺ?ĞůĆ?ƚĞǀĞŜĆ?ŽŜΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ ,ĂžƉƚŽŜĹ˝ĆľĆŒĆš ϭϏͲϭϭ With EĹ?Ĺ?Ğů^ƚĞǀĞŜĆ?ŽŜ DÍ—ϏϳϾϯϭϹϾώϰϯϳ Seeding with safety harness and landyard seeding only, the roof can take up to 2 years before it looks established and most perennial species will not flower until the ^ƉĞÄ?Ĺ?ÄžĆ?>Ĺ?Ć?Ćš ϭώͲώϲ second growing season and therefore it is recommended that seeding is always used in combination with ^Ä‚ĹŻÄžĆ?ĚžĹ?ĹśĹ?Ć?ĆšĆŒÄ‚ĆšĹ˝ĆŒ plug planting. Additionally,Í—Ä‚ĹŻÄ‚Ĺ?ŜĞžĹ?ĹŻĹŻĆ?ΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ it is recommended that an annual mix is sown with a perennial mix to provide ^ĞĞĚDĹ?džĞĆ? ώϳͲϯϏ ĹŻÄ‚Ĺ?ŜĞDĹ?ĹŻĹŻĆ?  colour in the first season. Substrates specifically designed for seeding are available that have a smaller particle size and higher organic content and should be spread as a top dressing on the main substrate. dÄžĆŒĹľĆ?ĂŜĚŽŜĚĹ?Ć&#x;ŽŜĆ? ĎŻĎ­ dÄžÄ?ŚŜĹ?Ä?Ä‚ĹŻDĂŜĂĹ?ÄžĆŒ Í—ĞůĂĹ?ŜĞΛÄ?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ Autumn sowing in August/September, depending on prevailing weather conditions, is recommended to ĹŻÄ‚Ĺ?ŜĞ,Ĺ˝Ç Ä‚ĆŒÄš DÍ—ϏϳϳϲϏϲϭϲϯϳϹ ĎŽĎŹĎ­ĎŽWĆŒĹ?Ä?Äž>Ĺ?Ć?ĆšͲ/ĹśĆ?ÄžĆŒĆš ensure that seedlings will germinate in favorable conditions and be exposed to chilling to break dormancy. BritishFlora can advise on the timing, seeding rates, substrates, and seed carrier required to sow with a seed Ä?ŽůŽĹ?Ĺ?Ć?ƚ͏ŽŜĆ?ƾůƚĂŜƚ Í—ĹŻĹ?ÇŒĆ‰Ĺ˝Ç ÄžĹŻĹŻÎ›Ä?ĆŒĹ?Ć&#x;Ć?ĹšĹ‡Ĺ˝ĆŒÄ‚Í˜Ä?Ĺ˝Í˜ĆľĹŹ mix to ensure even and effective establishment of your green roof. >Ĺ?ÇŒWĹ˝Ç ÄžĹŻĹŻ DÍ—ϏϳϰϯώϳώϹϳϏϹ Plug planting

DĂŜĂĹ?Ĺ?ĹśĹ?Ĺ?ĆŒÄžÄ?ĆšĹ˝ĆŒ 'ĆŒÄ‚ĹšÄ‚ĹľŽƾĆ?Ĺ?ĹśĆ?

Plug planting is an effective way of quickly establishing a green roof and a wide range of suitable drought tolerant species for green roofing are available from BritishFlora as plug plants. tĞůÄ?ŽžĞƚŽ BritishFloraÍ›Ć?ĎŽĎŹĎ­ĎŽ/ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜWÄ‚Ä?ĹŹÍ˜KĆľĆŒĆŒÄžÇ€Ĺ?Ć?ĞĚĆ?ƉĞÄ?Ĺ?ÄžĆ?ĹŻĹ?Ć?Ć&#x;ĹśĹ?Ĺ?ŜώϏϭώĹ?ĹśÄ?ůƾĚĞĆ? Extensive lightweight substrates between 80-150mm are suitable for wildflower plug plants, with some plants requiring Ä?Ĺ˝ĹľĆ‰ĆŒÄžĹšÄžĹśĆ?Ĺ?ǀĞĹ?ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜŽŜĞĂÄ?ĹšƉůĂŜƚĆ?ƉĞÄ?Ĺ?ÄžĆ?Ć?ĆľÄ?ŚĂĆ?Ĺ‡Ĺ˝Ç ÄžĆŒĹ?ĹśĹ?Ä?Ĺ˝ĹŻĹ˝ĆľĆŒÍ•ŚĞĹ?Ĺ?ŚƚĂŜĚĹ‡Ĺ˝Ç ÄžĆŒ deeper substrates than others (refer to plant species table at Ć‰ÄžĆŒĹ?Ĺ˝ÄšÍ˜dĹšĹ?Ć?Ć?ĞĂĆ?ŽŜÇ ÄžÄ‚ĹŻĆ?Ĺ˝Ĺ?ĹśÄ?ůƾĚĞÄ‚ĹśÄžÇ Ć‰ĆŒĹ?Ä?ĞůĹ?Ć?ĆšÇ Ĺ?ƚŚĹ˝ĆľĆŒĨƾůůĆŒÄ‚ĹśĹ?ÄžŽĨĆ‰ĆŒĹ˝ÄšĆľÄ?ĆšĆ?Í•ƉŽƚĂŜĚ the end of the document). Ideally plug plants should be ĆšĆŒÄ‚Ç‡Ć?Ĺ?njĞĆ?͘dĹšĹ?Ć?ĎŽĎŹĎ­ĎŽWĆŒĹ?Ä?Äž>Ĺ?Ć?ĆšĹ?Ć?Ĺ?ĹśÄ?ůƾĚĞĚÄ‚Ć?Ä‚ĹśĹ?ĹśĆ?ÄžĆŒĆšƚŽƚŚĹ?Ć?/ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜWÄ‚Ä?ĹŹÍ˜ƚĞÄ?ŚŜĹ?Ä?Ä‚ĹŻ planted at the beginning or the end of the growing season ŜŽƚĞĂŜĚĞdžƉůĂŜĂĆ&#x;ŽŜŽĨĹ˝ĆľĆŒĆšĆŒÄ‚Ç‡ĂŜĚƉŽƚĆ?Ĺ?njĞĆ?Ć‰ĆŒĹ˝Ç€Ĺ?ĚĞĆ?Ä¨ĆľĆŒĆšĹšÄžĆŒĆ‰ĆŒĹ˝ÄšĆľÄ?ĆšĹ?ĹśÄ¨Ĺ˝ĆŒĹľÄ‚Ć&#x;ŽŜÄ¨Ĺ˝ĆŒĹ˝ĆľĆŒ (March/April, or September/October) to allow the plants to Ä?ĆľĆ?ĆšĹ˝ĹľÄžĆŒĆ?͘/ĆšĹ?Ć?Ĺ˝ĆľĆŒĹ?ŜƚĞŜĆ&#x;ŽŜƚŚĂƚƚŚĹ?Ć?Ĺ?ĹśÄ?ĹŻĆľĆ?Ĺ?ŽŜÇ Ĺ?ĹŻĹŻžĂŏĞĹ˝ĆľĆŒÄ?ĹŻĹ?ĞŜƚ͛Ć?ƚĂĆ?ĹŹŽĨƋƾŽĆ&#x;ĹśĹ?Ä¨Ĺ˝ĆŒ establish. BritishFlora can advise on planting densities, suitable substrates and additional growing materials that will Ć‰ĆŒĹ˝ĹŠÄžÄ?ĆšĆ?ĂŜĚĹŠĹ˝Ä?Ć?žƾÄ?ŚƋƾĹ?Ä?ĹŹÄžĆŒĂŜĚĞĂĆ?Ĺ?ÄžĆŒĂŜĚĹ˝ĆľĆŒĆ?Ä‚ĹŻÄžĆ?ĂŜĚƚĞÄ?ŚŜĹ?Ä?Ä‚ĹŻƚĞĂžÄ‚ĆŒÄžĆšĹšÄžĆŒÄžƚŽŚĞůƉ ensure establishment of plug plant vegetation. Fig.2. wildflower plug Ç Ĺ?ƚŚĂŜLJÄ¨ĆľĆŒĆšĹšÄžĆŒĆ‹ĆľÄžĆŒĹ?ÄžĆ?LJŽƾžĂLJĹšÄ‚Ç€ÄžÍ˜

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BritishFlora ,6 FREE

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British flora green roofing information booklet 20pp a4  

British flora green roofing information booklet 20pp a4  

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