My two lemon showed signs of server N and general mins but on the other side of the yard our mandarin was doing better so when I ferted the lemons with a little I cut in 1/4 for mandarin I added mineral supplement and compost and air acted area around canopy now I'm having the tips of the branches burning to death in a brown melt that's working its way down the stems. We finally had some rain but today I flooded the area and won't added anything that normally happens end of March. I'll add pictures