Help! Lumpy lawn.

Hello I have a lawn that was allowed to get a lot out-of control over the years by previous owners anyway the grass although seems wild I think may survive with some help but the ground underneath is very bumpy.. it's almost impossible to get a lawn mower over it. I'm wondering if anyone has any ideas on how to get the ground flat again. I have attached some pictures although the lumps don't show to well on cam.

Thanks in advance xo

 

Easiest thing to do is to rake some compost over it to fill in the hollows, the grass will soon grow up thru it

 

If grass is mowed with a mower without a roller, this will happen, rolling with a lawn roller will help as will getting some air in with spikes. The ground has settled, by rolling you will even out the surface and also it splits the grass helping it to grow finer and more vigorously. Trouble with seeding a new lawn at this time of year is the air is full of weed seeds, you might not be happy with what you get. Of course you also get the nice stripes with a mower with a roller on it too, which can be a bonus.

 

A lawn cut without a rear roller mower will not get bumps and lumps. The bumps are caused through the grass lumping up and the grass type.
The uk loves lines where as in Europe you will not see such a high regard to lines.
You either start fresh and rip the lot up and either seed or turf or you use top soil and seed after a good scarify.

 

Liz this can be true, but as someone who assisted a groundsman and worked for a horticultural company, I know you have to roll grass if you want a fine level surface. Of course we might not all want a bowling green surface, but if you do, then a roller is vital in maintaining the surface. I personally use a hover as my lawn is purely a working surface with a lot of beds in it, but you cannot get the same flat surface with a rotary mower however hard you try. A multi bladed cylinder mower with a roller is the type used by groundsman and green keepers where a fine grassed level surface is required, rotary movers are ok for rougher longer grassed areas.

 

90% of lawns in this country are not to sports standard and most domestic rear rollers don't have a great deal of weight behind them unlike machines used on football, golf, cricket, race courses. A typical Hayter 48 weighs in at around 49kg but the load on the rear roller is less than that as an example.
Also domestic type cylinder mowers are no where near the quality of cut or weight achieved by a commercial Dennis and others and where the grass type and soil make up is guaranteed within a controlled sports environment.
Have have yet to see any lawns I've cut with both Deers, Hayters became flat and lawns cut with Etesia became lumpy.
Sports turf management is far different in terms of controlling the environment it's designed for compared to domestic.
What you do get is ribbing if you follow the same direction where ruts are hammered regularly in the same spot but again that's fairly rare.
Simply put the lumps in that lawn are where the type of grass has grown and the soil around its base has lifted due to the root structure.