Harvesting from Asparagus crowns

I decided to buy some asparagus crowns which were delivered yesterday, was going to put them into pots but as the rain had started I thought I would wait to see how the weather was today, all the frost was away this morning so right or wrong decided to plant the crowns (I could lose them trying to keep till things warm up) the ground where I was planting them still had a crust of iced soil/seaweed over it so I scraped as much off it as I could with a fork then sliced a 1foot square and removed the top frozen cap, below that the soil was fine I then removed the soil to about 1ft deep scattered some lime and mixed it in to the base I then added some garden compost with some lime added, shaped this into a cone then sat the crown on top and spread the roots around it, using my hands to avoid any frosted soil near the roots, I covered the roots and filled the hole topping it off with the cap I had removed