Fertilizing once or twice a year spring and or early fall with an organic rich fertilizer is usually enough.
Sedum roof fertilizer.
Too much nitrogen will encourage weeds to grow on the roof and will also kill the sedum plants.
It provides a strong root system for the sedum plants and thus increases plant health.
Sedum nutrition is an organic fertilizer that meets all needs of a sedum roof.
Check for bare areas.
Increasing the application rate of organic fertilizers to compensate for their lack of readily utilizable nutrients may be effective at improving sedum green roof aesthetics however there may be associated risks as far as nutrients in runoff.
Apart from the economic incentive for selecting a diverse pallet of sedums for the roof it also has ecological effects as a resilient roof will require less fertilizer applied as well as fewer pesticides.
Partly because sedums require little or no fertilizer or other maintenance species that form low mats are used for green roofs.
Never exceed the manufacturers recommended rate.
This might also be good to know should you be required to comply with particularly strict local environmental regulations.
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Sedum fertiliser contains all the nutrients that a sedum roof will need but in a slow release formula so that unused nutrients don t get washed away by rainfall.
Cut upright types to the ground after fall frost or before new growth begins in spring.