When pests like crows, sparrows, pigeons, squirrels realize that seeds of vegetables are being sown on the terrace garden , they are eating almost all the seeds and no seeds are germinating.
The first time, the seeds are sowed, these pests do not detect their presence, however the next time they are very quick in eating all the seeds.

The gardener will initially think that there is problem with the seeds, because almost no seeds are germinating and money spent on purchasing the seeds is wasted.
However if the seeds are sowed indoors where these outdoor pests cannot reach them, these seeds will germinate and grow into plants.

Due to lack of sunlight, the plants have a very long stalk, and are lacking in chlorophyll
However instead of having all seeds eaten by the pests, growing the plants indoors initially is a better option