After about three weeks,the rooftop garden is ready for planting.Put the seeds directly into the wet grass cuttings.This garden is a good place to grow peas,tomatoes,beans,onions and lettuce.If the box is deep enough,potatoes and carrots will also grow.
It is important to keep the grass wet until the plants begin to grow.When the plants are growing,they will need watering every day,unless there is rain.And they will need some liquid fertilizer.Also,seeds and new plants must be protected from insects and birds.
Rooftop gardens are increasingly popular,and not just to grow vegetables.They keep buildings cooler in the sun,so they save energy.They can also extend the useful life of a roof.Rooftop gardens also reduce the runoff of storm water and help clean the air.Plus they add beauty,and give birds and insects in the city a nice place to live.
The building of a rooftop vegetable garden
things needed (1)requirements
a roof to (2)
the weight (3) and
strong enough
grass cuttings to be used as
(4)to be
pressed down
a sheet of plastic to (5) possible leaks(渗漏) on which to
(6) the
cut grass
a (7) box to hold the
cut grass made of 4 pieces of wood
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