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− | <font size=3>''' | + | <font size=3>'''Comparison of most common extensive green roof planting methods'''</font size><br> |
− | Link to this [[ | + | Link to this [[Comparison of most common extensive green roof planting methods|table]] |
− | <table | + | <table class="sortable"> |
− | |||
<tr> | <tr> | ||
<th>Planting method</th> | <th>Planting method</th> | ||
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td>Plugs</td> | + | <td width="10%">Plugs</td> |
− | <td>Plants in small pots</td> | + | <td width="10%">Plants in small pots</td> |
− | <td></td> | + | <td width="10%">High</td> |
− | <td></td> | + | <td width="10%">Medium</td> |
− | <td></td> | + | <td width="10%">Low</td> |
− | <td></td> | + | <td width="10%">Low-medium</td> |
− | <td></td> | + | <td width="10%">Quick, 1-2 years depending on species, plug size, and initial planting density</td> |
− | <td></td> | + | <td width="30%">Allows for most flexible and controlled planting design; can be added to green roofs started from cuttings or to pre-grown mats to increase species diversity</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td></td> | + | <td>Cuttings</td> |
− | <td></td> | + | <td>Small pieces of sedums that are spread across or mixed into growing medium</td> |
− | <td></td> | + | <td>Good</td> |
− | <td></td> | + | <td>Low</td> |
− | <td></td> | + | <td>Low</td> |
− | <td></td> | + | <td>Low - More than plugs, less than seed</td> |
− | <td></td> | + | <td>Quick, 1-2 years</td> |
− | <td></td> | + | <td>Less control over final look than with plugs</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td></td> | + | <td>Seed</td> |
− | <td></td> | + | <td>Seed</td> |
− | <td></td> | + | <td>Good</td> |
− | <td></td> | + | <td>Lowest</td> |
− | <td></td> | + | <td>Higher</td> |
− | <td></td> | + | <td>Lowest - Less than plugs or cuttings</td> |
− | <td></td> | + | <td>Longer than plugs or cuttings – typically 2-5 years depending on species </td> |
− | <td></td> | + | <td>Less control over final look than with plugs; seed cannot be allowed to dry out until germinated; more bare soil can result in higher weed pressure; need more erosion protection during establishment since soil is bare; only a limited number of species can germinate from seed on a green roof</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td></td> | + | <td>Pregrown Mats</td> |
− | <td></td> | + | <td>Plants delivered to the site pre-grown into an erosion control mat with growing medium </td> |
− | <td></td> | + | <td>Good</td> |
− | <td></td> | + | <td>Low</td> |
− | <td></td> | + | <td>Low</td> |
− | <td></td> | + | <td>Low-Medium</td> |
− | <td></td> | + | <td>Almost instant green</td> |
− | <td></td> | + | <td>Instant erosion protection if fully vegetated; precise plant composition difficult to predict; less control over final look; less species diversity possible than with plugs, can be combined with plugs to increase species diversity</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td></td> | + | <td>Modular Systems</td> |
− | <td></td> | + | <td>Plastic, metal, or degradable trays filled with growing medium and delivered to site pre-grown </td> |
− | <td></td> | + | <td>Good initially</td> |
− | <td></td> | + | <td>Low</td> |
− | <td></td> | + | <td>High </td> |
− | <td></td> | + | <td>High </td> |
− | <td></td> | + | <td>Almost instant green</td> |
− | <td></td> | + | <td>Allow for greater precision of design, some may require frequent plant replacement due to edge effect; some trays may retain heat and cause soil to dry out faster, negatively affecting plant health</td> |
</tr> | </tr> | ||
</table> | </table> | ||
− | [[ | + | <noinclude> |
+ | [[Category:Level 3 - General information, reference, tables, images, and archives/Tables/Green roofs]] | ||
+ | </noinclude> |
Comparison of most common extensive green roof planting methods
Link to this table
Planting method | Description | Survival rate | Installation labor | Maintenance requirements | Expense | Establishment time | other pros, cons, notes |
---|---|---|---|---|---|---|---|
Plugs | Plants in small pots | High | Medium | Low | Low-medium | Quick, 1-2 years depending on species, plug size, and initial planting density | Allows for most flexible and controlled planting design; can be added to green roofs started from cuttings or to pre-grown mats to increase species diversity |
Cuttings | Small pieces of sedums that are spread across or mixed into growing medium | Good | Low | Low | Low - More than plugs, less than seed | Quick, 1-2 years | Less control over final look than with plugs |
Seed | Seed | Good | Lowest | Higher | Lowest - Less than plugs or cuttings | Longer than plugs or cuttings – typically 2-5 years depending on species | Less control over final look than with plugs; seed cannot be allowed to dry out until germinated; more bare soil can result in higher weed pressure; need more erosion protection during establishment since soil is bare; only a limited number of species can germinate from seed on a green roof |
Pregrown Mats | Plants delivered to the site pre-grown into an erosion control mat with growing medium | Good | Low | Low | Low-Medium | Almost instant green | Instant erosion protection if fully vegetated; precise plant composition difficult to predict; less control over final look; less species diversity possible than with plugs, can be combined with plugs to increase species diversity |
Modular Systems | Plastic, metal, or degradable trays filled with growing medium and delivered to site pre-grown | Good initially | Low | High | High | Almost instant green | Allow for greater precision of design, some may require frequent plant replacement due to edge effect; some trays may retain heat and cause soil to dry out faster, negatively affecting plant health |
This page was last edited on 3 August 2022, at 21:04.