I have planted Carnation (Dianthus caryophyllus) seeds indoors in a seed tray.
The seeds germinated 5 days ago and had to do 2 days without grow lights since they were not installed till then.
Once operational, I placed the seed tray just below the grow light in a small space (kindly see that in the pictures attached).
It has been three days and there has been no sign of true leaf growth in any of the Carnation seedlings. Moreover, the seedling cotyledons are now beginning to curl inwards. I am unaware of what might be the cause of the growth halt and would like anyone's kind assistance.
The conditions in the space are as follows:
Air flow: none Area Temperature: around 26 °C Room temperature: 21°C to 24°C Relative Humidity: around 50% Soil type: Potting soil (peat moss) Light time: 18 hours Dark time: 6 hours Light power: 43 watt LED