How to make lawn border smaller? Diagram!

[BiscuitDrama]

We’ve got a couple of odd shaped borders that need straightening up. I’m looking at edging options, but they all seem to be for when you’re creating a new border and chopping into an existing lawn.

Do we just make the lawn bigger than we need and then chop into it when we want it to be? Or can we put lawn edging where we want the edge to be and fill in with soil and then seed it? I’m worried the edging isn’t sturdy enough.
Also don’t want a massively expensive option as we have about 20/30m in all.

You could sew the seed but might take a little while to establish. Buying turf on a roll and cutting to size would fill the gap but would be a lot quicker but probably more expensive.

Grass seed is cheaper, turf is quicker - depends on your priorities. Both need good preparation and a certain amount of looking after afterwards, and you can't walk on them for a while, but grass seed will take longer to be useable. Seed needs to be down in late summer, early autumn and will be just about indistinguishable from the rest of your lawn by the following summer... so if you wants results before then, use turf.

Sorry, not been clear at all. We’ll seed, but how do the edges work?
Make the lawn bigger than we need and then cut back into it in a few months? Put edging in at the beginning?

Ah right!

Either but I’d just seed and cut back if you have nothing in the borders... but seed is pricey, don’t overdo it.

Obviously if you want to plant out the borders before the seed is established, put in edging and seed to that.

Isn’t overawed a and cut back to the line you want - you don’t be have to go miles over, but going over a little and then cutting back should give you a neater edge

Borders are planted already but the stuff near the edge is mostly a mess of geraniums that we’ve inherited. So it would be good to not have to go too far.