Rooftop Gardening

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Ornamental rooftop garden:

Rooftop gardening is one of the afforestation methods for urban greening.

Benefits of rooftop gardening:

1.  Reduce absorption of excessive solar energy, resulting in a significant energy saving for air-conditioning in a building.
2. vegetation on the roof improves the prevailing dry climate in a city with humidification by their transpiration and also contributes to air purification
3.  it improves the physical environment and reduces the mental stress level in living spaces.
4. an increase in biodiversity

Two types of rooftop gardening:

Intensive roof top gardening

Intensive green roof uses a planting ground with thick soil to enable many kinds of plants including trees to grow. To establish a thick soil layer on a rooftop, the rooftop foundation must be improved at great expense.

Extensive rooftop gardening

On the other hand, extensive green roof uses a planting ground with shallow and light substrates without significant structural alteration to the building. Only limited plant species can grow in the shallow soil or substrate layer with a little water holding capacity, so we must irrigate frequently. We have to select plants that have high drought tolerance.

Selection of substrate:

Peat

Composted manure

1. Cotton gin trash
2. Rice hulls
3. Olive mill wastes
4. Tree bark
5. Urea formaldehyde resin foam
6. Organic waste components (coarse coir, fine coir, composted green waste, almond hull and pistachio hull)
7. Soil
8. Leaf mold
9. vermiculite

Substrate depth should be less than 20cm.

Selection of plants:

Sedum middendorffianum 

Allium senescens 

Chrysanthemum zawadskii

Thymus serphyllum L

Fragaria × ananassa Duch.

summer berry

Lampranthus spectabilis

Ophiopogon japonicus L

Evolvulus pilosa

Hedera helix

A permeable barrier sheet and wire net are set at the bottom of the container to hold substrates and to drain well.

Irrigation:

Irrigate daily for one month to allow rooting. After this each container should water 5 L another day.

during rainy day don't irrigate plant.

Fertilizer:

Apply the suitable organic fertilizer according to soil pH which release the nutrients slowly