My Ready Lawn has been down for over a year and it is struggling. I fertilised with Tui LawnForce at the end of spring and again last weekend. I treated the lawn for grass grub at the start of autumn. The lawn is pale green and quite patchy. Should I use Urea, will this help? If so, if I mix with water and use, do I still need to water well in? 

• There could be several reasons for the lawn being patchy. It could be due to inconsistent watering throughout the season, from spring to autumn water the lawn at least 2-3 times a week.
• Another reason could be uneven fertiliser application. The best way to apply fertiliser is by using a hand held or broadcast spreader, the size of the lawn will dictate which spreader to use.
• If you apply urea you will get a lot of top growth and have to mow your lawn once a week, but you won't have the root growth to sustain the top growth.
• The other reason could be grass grub, if the grass comes out in clumps if pulled then it is likely to be grass grub, treat with a suitable grub control product available from garden centres and hardware stores, for the best control apply grub control products in autumn or spring when the grubs are close to the soil surface.
• If you have a dog then it could be pet pee patches, encourage the dog to go in one place away from the lawn, treats help to retrain pets.
• To green up your lawn apply LawnForce Rapid Green hose on lawn fertiliser, it will green up lawns within 3-5 days
• Tui recommends using the LawnForce range of fertiliser as they stimulate growth from the roots up, this way, lawns will have more drought tolerance in summer.
• How green your lawn is will depend upon what type of lawn seed was used in the Ready Lawn, some grass seed varieties are light green, some are dark green. 
• The patches will need raking out and resowing. Try to get seed that matches the existing lawn, if the existing lawn is light green it could be a perennial rye blend, if it is dark green then it is likely to be Tall Fescue.