Spinach | New Gardeners | Commercial Hydroponics farming

Hi,
I have sown spinach seeda 2 weeks back. Still now the plants has not come up in full fledge even though all the seeds has been germinated. Do no what is the issue...is there any deficiency in the growing media
I have used Coco peat + red soil + compost(I got this compost from local nursery)
Pls suggest......I am very much disappointed looking into the spinach plants

Not able to upload the photo...I can share via mail if needed.