Wow they grow quick!

Do you mean Friday as in yesterday?  if so that is too quick, but if you meant last friday, it's possible.  With the warmth in the house.

Thing is, will you be able to keep them warm enough until you can get them outside?

I sow mine late April, and they stay in the greenhouse until middle/late May when they go outside.

It is a bit quick, but if the conditions are just right.........  Hope they do well for you!

Well the packet said to sow mid-April onwards on a warm windowsill - so I have done this, the sane as with all the other seedlings (which have not shot up in this way - imam still waiting for them to even show!  It isn't overly warm in there as there is no heating but it is very bright as it is south facing snd I think the sun we have had has done them well. They are big thick seedlings at the moment so hopefully will stay like this / I intend to do another sowing in 3-4 weeks time so they are staggered anyway. They seem to have slowed down this afternoon and focused their energy on opening their leaves

ive sown climbing french beans in the greenhouse too early and they went to mush.

sown some last week in the greenhouse and they have started to sprout. just hope the warmth keeps up!

Any beans I've pre sprouted and planted out I've lost - I direct plant them in the ground from early may and they do just fine.

I wouldn't have room for all these seed trays in my house or greenhouse anyway!!

Might be worth giving it a go

I have taken to growing Climbing French Bean 'Isabel' - very good.