Q.Fertlizer
Is it good to use citrus & avocada fertlizer for lawn grass?
Lawn fertilizer is the best to use for lawn grass. The reason is that lawn grass needs a lot of nitrogen compared to other nutrients. Citrus fertilizer is not ideal for lawns, but it is better that general purpose or vegetable fertilizer, because citrus fertilizer is also somewhat high in nitrogen. Check the NPK rating on the fertilizer you choose.
Here is more information:
http://extension.illinois.edu/lawntalk/planting/choosing_fertilizers_for_home_lawns.cfm
https://www.gardeningknowhow.com/lawn-care/lgen/type-of-lawn-fertilizers.htm