Callaloo sowing advice

Can anyone tell me if Callaloo is best surface sown, or covered with a fine layer of compost? The pack says direct sow, but that is about it......

I sowed some a week or so ago, and the squirrels have been rooting around in that barrel, so I reckon they won't germinate now - I have another packet, but want to try and ensure that I get something this time?

 

Thank you @misterQ

Almost everything else sown at the same time has germinated, hence my thinking that the seeds have gotten too far buried by the squirrels. Going to put a net up later on to stop that from happening.

 

Ours are nowhere near that size - only just about getting going in fact.