For Ganpati flower decoration at home, you can use bright and colourful flowers like Roses, Marigolds, Jasmine, Orchids, Lilies, Hibiscus, Lotus, Dahlias, Carnations, and Chrysanthemums. However, the Marigold flowers are the most auspicious for the occasion.
You must not offer the Tulsi plant and its flowers to Lord Ganesh. Also, do not use it for decoration.
For your Ganpati decoration at home, the items you may need are flowers, LED lights, diyas, a small mandir, a small table or stool, and other decorative items.
If you want to use green leaves for your Ganpati decoration at home, you can use Mango, Banyan, Banana, Betel, Coconut, and Ashoka leaves.