Question re growing Leeks/Spring Onions

[MissFoodie]

This may sound silly, but I want to check before I order any baby plants....
if I plant 1 baby leek or spring onion plant, will this grow into/yield me 1 leek/spring onion?

and if so, why are they so expensive??? am seeing 6 baby leek plants for £3....which seems a lot if I'm only going to get 6 leeks out of it (although tasty)

or am I missing something and each plant will yield more than one???? I don't see how it can....!!!!

same for Spring Onions????

yes you are correct. One plant: one spring onion, and for leeks the same (except if you cut a young leek at ground level early you will sometimes get a second one growing up, so you might get two). Buying the plants is not really cost effective as you have realised, better to grow your own plants from seed.

why are they so expensive compared to other gyo veg plants????

tssskkkk