I am a complete beginner gardener. On 22 September I planted some daisy seeds in a container and covered with plastic wrap. Tiny green leaves sprouted after a few days, so I removed the plastic. However, nothing else has grown since. I have read that "true leaves" now need to grow - which would be the second set of leaves. How long does this usually take? The weather here is still very warm, so I have placed the container where it receives a few hours of direct sun, and a few hours of shade. Thank you.