Petunia the one which is available in many color (purple, white, yellow, pink, red , mixed colors) doesnt easily come up when u sow the seeds instead its better to buy a fresh plant with flowers form any nursery ... garden nursery between gulf cinema and mall round abt is where i usually get plants from. Marigold comes in three to four variations and they grow from seeds very well ... like wut baldrick said u cud try it in sep as it already getting hotter ...chrysanthemums also u can find in roundabats and flower in bunches like the above two ,plant is better tahn trying from seeds.

As far as seed is concerned u cud get it from FFC, LULU , Giant or any nurseries .....

enjoy gardening ....