Asparagus?

[My Foot Smells]

I've never grown an asparagus bed, but always wanted to. I'm thinking of the new variety, Jersey Knight, which is an all male cultivator, but I have several questions that maybe someone could assist.

I am looking to plant 25 crowns in a 5'x10'x21" bed.

Q:

1) I am thinking about starting w/ a 3 y.o. crown, as opposed to seed. However, I see some suggest that a 1 y.o. crown is just as good.

2) I'm not 100% sold on the variety, but seems like the new strain is a lot better production than the old Martha and such. So any advice on variety would be appreciated.

3) Soil preparation and planting depth. Says to plant 12" deep and fill as it growns until you get to soil top. Also say it is heavy nitro feeder.

4) Fall planting or spring planting. I can have the bed ready in Sept., but I see most suggest planting in the spring. currently 7B location.

As stated above, I have never attempted to grow asparagus, but like asparagus and cook on grill often. So any general troubleshooting.

....or maybe, it is really not worth it taking up space for little production. I do like the perennial factor.

tia