you can remove all the bits that are that mish-mash mauve. If It's a sucker it will take over anyway.
You could take cuttings from the yellow part to grow on their own roots.
recommending a company
What do we deduce from this?
I'm not a user of chemicals and I think it's a complete waste of time for newly germinated weeds but it would do the job on brambles
you're better off with what you've got and some interesting plant in a wide border created in front of the fence. Cherry laurel (assuming Prunus laurocerasus) is huge in all dimensions and boring.
I expect so Tootles. Same here
I think if they germinate they will be normal. Seeds, especially weeds, lurk in the soil and germinate when conditions are right, soil disturbed, enough water etc. they make normal plants when they do germinate.
They're so pretty
Hard to get rid of though so I don't try, just enjoy the flowers and the leaves don't hang around long
dig one up and show us the roots
2015 isn't long ago. As SG says, depends what they are. I don't waste a lot of time and compost with well out of date seeds, just chuck them on the garden. But 2 years is nothing to the majority of properly stored seeds.