I put buffalo pro weed n feed in my lawn in March. After that it getting worse and worse. How to get my green lawn back.
I would need specifics of your location to assess the reason for the die back here. It is most likely that it is only a co-incidence that it has deteriorated after applying the Buffalo Pro weed and feed. Here in Sydney we have had a dry Summer followed by a dry winter and the majority of lawns near to me look similar or worse than this.
I would suggest a nourishing organic fertiliser regime in order to return it to a great state. I would start with a spray on Seasol formula. Seasol is similar to a fertiliser, though it is like a soup on a cold winters day as apposed to a full meal of steak and chips. A sick lawn needs soup not chemical fertilisers.
In the future however, once the lawn is healthy again, a slow release chemical fertiliser is the way to go for long lasting stable fetilisation.
Jason has also opened up a discussion that I am sure you will find helpful- https://www.workshop.com.au/t5/Garden/How-to-improve-your-lawn-this-Spring/m-p/13998
Any further questions feel free to ask.
Have you seen this great discussion - https://www.workshop.com.au/t5/Garden/How-to-improve-your-lawn-this-Spring/m-p/13998
There's lots of helpful advice there, including wisdom from experienced horticulturalist @Adam_W.
Let me also extend a very warm welcome to the community. It's fantastic to have you as one of our latest Workshop members. Please post whenever you need assistance or have something to share. We have plenty of helpful members who are happy to share their experiences and knowledge.
Winter rainfall in Victoria was below average across the north of the state. How regularly have you been watering?
Do you think its just frost that has sapped the colour of your lawn @Goldy?
Buffalo does have a tendancy to lose colour over winter. Buffalo grasses really don't like cooler climates - http://buffalolawncare.com.au/buffalo-grass-lawn-care/105-winter-colour-in-buffalo-lawns.html
@Goldy, I would just recommend you follow the advice of @Adam_W on this discussion - https://www.workshop.com.au/t5/Garden/How-to-improve-your-lawn-this-Spring/m-p/13998