Dealing With Mixture of Zoysia and other stuff

If you are like me you have a yard mixed with Zoysia and other non-Zoysia stuff. It occurred to me while reflecting on the "lawn care" sales folks that when I put down plant food that I only want to put it down on the Zoysia, otherwise it is like providing aid and comfort to the enemy. I certainly don't want to do that. I want the non-Zoysia stuff to struggle off and get crowded out even if it does take sometime to do that, feeding it would certainly make it stronger and more of a challenge for the Zoysia to win the battle of the lawn. One of my neighbor feed the her entire yard and the Zoysia in one area has actually gotten smaller over the years, the other Zoysia areas are denser than mine, but I cannot determine any growth or spreading. I really have a challenge with the entire lawn-care industry, they feed so it grows more and you spend more time either cutting or more money paying someone else to cut your grass. What a nice form of planned obsolescence perpetual income for them and there lawn mowing compodres. Similar to the Plumbers Association supplying silver maples trees (which are sewage tile invasive trees) to the home builders as they are beginning to landscape the suburbs of the 50's, 60's and 70's. They planned ahead for the day when the building boom might slow down and they would need work cleaning out sewage drains and it was very successful.
As Zoysia Lovers we too can plan ahead and look forward to the day when all our grass grows out and not up and driving the lawn mowing industry to it's knees and thus keeping more of our money in our pockets where it belongs or at the very least spending less of our time cutting the grass or both saving money and spending less time cutting. Really sounds and is a win win situation for the Zoysia Lover in all of us.