My grass has white patches. Is this some type of fungus? How can I treat this so my grass is green again? Thank you in advance.
Without an image I can only guess you may be describing Powdery Mildew or
Slime Mold.
These articles have information on these issues.
https://www.gardeningknowhow.com/lawn-care/lgen/powdery-mildew-on-grass.htm
https://www.gardeningknowhow.com/ornamental/fungus-lichen/what-is-slime-mold-slime.htm
Feel free to upload an image if these do not address your issue.
I had a new lawn laid last year, and although it was lovely and green and growing well, I cut it on a high setting on the mower and DID NOT fertilize it. After about 2 months, it started dying off in huge patches....now I'm left with a dreadful mess with what looks like lots of worm casts, which I brush off, but then they seem to reappear overnight. Someone has said it may be contaminated topsoil which was used, as it was raised about a foot in height on top of my old lawn which I never had any problems with. Is there anything I can do without having to dig the whole lot out? Many thanks.
It is possible that a toxin or disease agent in the topsoil is responsible- maybe you could contact the supplier and find out the source.
Sometimes the death of new lawn grass is caused by timing (planting in summer when it's too hot for young grass to thrive) or by drought conditions in your area. On the other hand, excessively wet conditions can kill new lawns by promoting disease, as discussed here:
https://ask.extension.org/questions/125039
Grub damage is another possibility:
https://extension.illinois.edu/lawnfaqs/grubs.cfm
We live in Zone 5, a suburb of Chicago. We basically have a Kentucky bluegrass lawn mixture. The lawn is over 40 yrs old. It was originally a sodded bluegrass lawn. Through the years, I find clumps and areas of creeping bentgrass growing. For me, I consider it a weed and prefer a more uniform appearance. The bentgrass is around the neighborhood, as close as next to me. I find myself pulling it and cutting it out of the lawn and then reseeding. It's ongoing, and I wonder if there is something else I could be doing to maintain my bluegrass mixture (creeping grass free). Your expert advice will be greatly appreciated. Thank you, Shel
There is an herbicide available called mesotrione (sold as Tenacity) that will kill creeping bentgrass specifically but will not kill bluegrass. If you can't find Tenacity, another option is to kill the creeping bentgrass patches with an herbicide that contains glyphosate. Glyphosate will kill the bluegrass as well, so you'll have to reseed it later.
Apply the herbicide in a ring six inches around the patch as well to kill any runners too.
The other option is, of course, to hand-remove all the patches of bentgrass you can find.
I have yellow patches on my lawn which only started in November. I feed the lawn regularly and also apply iron suphate (mainly to help prevent worm casts). Help!!!
It could very well be due to excess Nitrogen.
This article will help you pinpoint the issue.
https://www.gardeningknowhow.com/lawn-care/lgen/fixes-for-yellow-lawns.htm
I am in zone 9. I have several large trees and shade and it is sandy soil (100%). I cannot grow grass or just a couple of patches. Will clover grow in sandy soil to cover where I should have a lawn? Without going to a huge expense (I am renting) or do you have another suggestion?
There are varieties of Clover that can grow in sandy soil.
I would suggest you talk with your County Extension Office for a list of seeds that are suited for you region. They are a valuable resource and can help you with a soil test.
Here is a link to help you find your nearest office.
https://www.gardeningknowhow.com/extension-search/
Here is a link with more information on Clover lawns.
http://cloverlawn.org/
What is this caused by, please?
This is actually Dollar Spot Fungus!
https://www.gardeningknowhow.com/lawn-care/lgen/dollar-spot-fungus.htm
I put too much compost on grass and didn't rake it. Now it just looks thick and wet. How do I fix it?
Smothering the lawn with compost can be problematic.
The recommended rate is 1 cu yard for every 1000 square feet of yard.
The depth should be 1/4" of compost.
Any deeper and you run the risk of losing the grass.
You can try raking out the area.
You may want to have a lawn expert examine your issue.
They may be able to help remove and aerate the lawn.