Thank you for the detailed problem description, it is very refreshing.

Tell us how you've determined that you're applying 1" of water. We need to make sure it's not due to lack of water or over-watering.

As far as Bayer Fungus Control (propiconzole), it will do a good job at controlling brown patch and many other fungal diseases. However, it could be something else. KBG is not as susceptible to brown patch and other foliar fungal diseases as other grass types, but is very susceptible to root diseases like Summer Patch. Also, red fescue does not like sun and will go dormant/brown in direct sun. Ideally you should post some pictures so we can see what's going on. If you do apply a fungicide as a preventive, I would advise going with a granular so that you'll have both foliar and root diseases covered.

Cool season grasses need at least 4 pounds of N per year to look good. For a high maintenance KBG lawn you can go up to 8 pounds. 75% of the total N should be applied in the fall with only 25% applied in late spring (May). A fertilizer that is mostly slow release would be preferable in late spring.

Thanks for replying.

I have one of those small rain gauges that you stick in the ground, so that's how I know about how much water the lawn gets.

I definitely should of taken pics last summer of the problem areas but unfortunately I didn't. When I was looking online at pictures of other lawns with problems like the one my lawn has to me it looked very much like brown patch but I could be wrong and it could be summer patch like you mentioned as they look fairly similar. I did try last year to incorporate a bag of just bluegrass in the sunny area as I did see that red fescue wasn't sun/heat tolerant but of course the fescue is still there. It is really good to know that granular protects from foliage and root fungus as I was going to get the spray one but think if it is possibly summer patch i'll get the granular one as it protects from both.

Just a couple more things. Do you think it is bad for any non mature grass that I plant in the spring to be given a granular fungicide?

Also I don't want to ask a stupid question but how do I determine the pound rate of nitrogen fertilizer to be spread from a bag of scotts 30-0-3 fertilizer?

Thanks

Just a couple more things. Do you think it is bad for any non mature grass that I plant in the spring to be given a granular fungicide?

Not at all. As a matter of fact, fungicides can be applied right at seeding time to protect against fungal issues like damping off which plague newly germinated grass. Grass seed that is coated is a lot of times impregnated with fungicide, among other things.

Also I don't want to ask a stupid question but how do I determine the pound rate of nitrogen fertilizer to be spread from a bag of scotts 30-0-3 fertilizer?

The 3 numbers found on every bag of fertilizer represent the percentages of Nitrogen(N), Phosphorus(P) and Potassium(K) in the fertilizer product. We generally refer to it as the N-P-K. So the Scotts 30-0-3 is 30% N, 0% P and 3% K. If you were trying to apply 1 pound of N, you would spread 3.3 pounds of the Scotts 30-0-3 product. If you were to use a 20-0-5 fertilizer, you would spread 5 pounds of product to get 1 pound of N. And so on.

I need to clarify, the recommendation of 4 pounds of N per year is per thousand square feet. You should not exceed 1 pound of N per thousand sq ft per application per month, so the 3 pounds of N that need to go down in the fall would be broken into 3 monthly apps of 1 pound N each.

I need to clarify, the recommendation of 4 pounds of N per year is per thousand square feet. You should not exceed 1 pound of N per thousand sq ft per application per month, so the 3 pounds of N that need to go down in the fall would be broken into 3 monthly apps of 1 pound N each.

Ok, this is what I wasn't sure about. I understand the N, P, K But wasn't sure about the per pound per sq ft application amount.

Great to know about the fungicide not affecting the new seeds.

I will definitely try the bayer granular fungus control this spring and see how that goes.

Thanks a lot for your help. Much appreciated.