I do know what this is... because I've grown it by accident.. and now I'm curious...

but does anyone else recognise it?

what plant is this?

Steve

Looks like a small radish plant?

it does but its not...

its something that I've never even thought of before as you usually use it long before it gets to this !

Steve

Intrigued at the clue!

Could it be a plant from something like a spice or bird seed?

well its actually "cress" (not watercress, just the normal mustard cress)... The tub had been left and forgotten about... I'm wondering how big it grows before it produces its own seeds and how etc...

Steve