My lawn after winter

This is my lawn currently (April). Before winter it was quite thick and in great condition but now it's looks not looking so great.... What's the best thing for it? It's looking really thin, particular in bottom right corner, do I need to overseed? The ground is pretty "squelchy" too.

I used "Aftercut lawn thickener" a couple weeks ago and whilst it's made it slightly greener, it hasn't really made it any thicker.

This is my lawn a couple weeks ago, after its first cut of the year:



Would appreciate some advise please! Thanks in advance.

 

Keep off it, there`s a possibility you have cut it too short for a first cut, apart from that it looks better than mine.

 

I have my mower on the highest setting (it's just a standard flymo). Would you not recommend doing anything with it at all?

 

Would also like some advice on this, our own lawn is in a similar sorry state after its first few cuts!

 

If its anything like mine, its not really started growing well yet.
Mine grew well into autumn and I actually had to cut mine just before Christmas, since then not much, I just topped it this weekend.
First time this year, its still cold out there.

 

Will the gaps fill in once it gets going? Or does it need over seeding?

 

If your worried I'd use a weed and feed once it gets going well.
Grass normally takes up small bare patches.

If its waterlogging that is a different matter.

 

I am no expert far from it, but from my experience it will thicken up and be fine, I would be very careful using weed and feed, I burnt mine last year,

Go round and aerate it with a garden fork, its still cold like mentioned and will get going in a few weeks are so.

 

Nows the time to treat your lawn with its spring feed if you wish. You need to use an Autumn based feed, no high N feed and to help to toughen up the turf a feed with iron is ideal. While you may notice a change in colour the Autumn based feed will not encourage rapid growth but will be working in easy terms to strengthen up the grass and promote the root system.
Once the weather warms up and the grass is in full flow you can then use a fertiliser aimed more top growth but I would stay clear of a weed and feed if you don't have weeds.
There's lots of granular feeds to select and it's best to apply this type with use of a spreader and insuring if you use iron in the product that you don't spill or walk on it once it's wet for a few days of damp weather as iron stains.
The spreader will insure even distribution and used correctly will cut down the chance of scorching and will create a uniform growth and colour while its active.
You can also use a liquid feed which is less likely to scorch but liquid feeds active lifespan tend to be shorter.
The clever thing with a fertiliser without herbicides is that you can adjust the NPK through a calculation where as a herbicide based product is aimed at applying at full strength so that there is enough herbicide to act on weeds. It's pointless applying a herbicide based one with no weeds as they are not residue and will not stop weeds appearing. If you have the odd weed then pull them out or use one of the many liquid based ones and just spray the odd weed here and there.
The key is to use the right fertiliser for the job so you promote growth without compromising the grasses natural ability. For example a grass fed a high N creating rapid growth can't regulate it's self in drought conditions or in cold conditions when growth should be slowing down.