Petunia from seed, no flowers?

[whymewhyme]

I have grown petunia from seed, planted in a pot and they have gone massive but no flowers. I have attached a pic
Any idea what I've done wrong?

Is it getting lots of sunlight?

Mine are exactly the same

The ones in the shops are forced in glasshouses with a combination of nutrients to induce flowering so that's why they and other bedding plants come into flower early.

Last year, I planted seeds but didn’t get any flowers. This year, I bought 8 small plants from Aldi for £1.89, and they’ve produced plenty of flowers.

How many plants in the pot? Did you pot up the seedlings and grow them on individually?