Help me with my neighbor situation.

What does their lease say ( not that you would know)? Are they responsible or their landlord? Ultimately it belongs to the landlord so keep asking him.

Do they have a mower? Our renting neighbors do not own a mower, so we loan them ours or my husband just quickly mows their yard when he mows ours.

1) Many tenants don't have any "investment" in the landscaping. Sometimes people rent for a reason -- to avoid lawn care and house maintenance issues could be a couple of them. Perhaps they don't have the tools. You should mention it to the landlord or city if your city has some sort of code compliance process. In our area, that would get the attention of the landlord as well!
2) IMHO ... too much is made of grass and landscaping. Lawns are really a terrible waste of water. But, again ... it is the landlords matter to control, correct ... or not.
3) Gutters -- again, why should the tenant really care about the gutters? Landlord's problem
I understand why many neighborhoods don't care to have rental property around them. But ultimately your recourse is to the landlord or city code compliance.

An "eyesore" doesn't really impact you, so I think  you should MYOB.

If you really feel like you need to control the condition of your neighbour's lawn, you can report them to the city and see if an ordinance can be filed against them.

I think it's between you and the landlord. Even though you've already talked to them, do it again. Have you asked other neighbors what they think to the yard?

The tenant has absolutely zero invested in the house. The fact they have teenage kids who are physically able to help is irrelevant. It's not their home, they don't care about it as much as you care about yours.

Pick up the phone, call the landlord "just following up, a few weeks ago I mentioned to you about the overgrown yard at your rental property; unfortunately it still looks the same, what's the status on getting it taken care of on a regular basis?"

The landlord might tell you to mind your own business, without an HOA there's not a whole lot you can do about it and I don't think the City (unless you're talking about broken down cars, etc. all over the lawn) will do anything about it.

Village or City. They usually act pretty quickly in our area.

This is bit off topic but related. Several years ago my city's newspaper ran a segment a couple times a week where neighbors could call the paper and "tattle" on their neighbors for having over grown grass. The paper would take a picture of the property and find out who owned it, who lived there, get in contact with them etc. Then people started turning in the city for not taking care of their own property, rights of way, etc. A number of weeks of that happening and the segments stopped. I guess some people felt like the city had no business telling others to take care of their grass if the city would not do the same for their own.

We are military and always rent. I don't want the hassle of owning a home and then moving every few years.

We do mow and weed whip and keep the shrubs tidy because while we live there, the yard is a reflection on us. I want it to look nice. Sometimes a lawn service comes with the rent, other times it's up to us. When the kids were young and DH was deployed, I liked having a yard service because you just can't mow a lawn and watch the kids. At least not with my DS. Now that he's a teen, he does our mowing. But several of our neighbors have teenage kids and I've never seen another kid in the neighborhood mow the lawn. I guess we are mean to our kid!

Have you met the neighbor yet? Maybe you could bring over the name of a yard service company that a friend or other neighbor uses. You can also ask if they need to borrow your mower. The gutters are the homeowners responsibility because they are 25 feet off the ground. But it varies from house to house.

And the weeds can be more than an eyesore. The weeds can encroach on the OPs property and make her lawn care harder.

Our city is on the job when it comes to enforcing the codes regarding how property is cared for. City code states that grass should not be over 12" high and vehicles should not be parked in areas not designed for parking. When our lawn crew was late getting to our yard for the first cut of the year, I got a letter from the city stating that I had a limited amount of time from the date of the letter to get the grass cut or they would cut it and bill me for it. By the time the letter got here, my grass had been cut and has been cut once a week since. Even though I was embarrassed to receive the letter, I was glad to know that the code enforcers were doing their jobs so well because we live near a creek and high grass is an invitation to the snakes that live near the creek to come looking for rodents. I'd rather pay a fine than get bitten by a snake.

I would call the city offices and ask about any codes that might be being violated. I would also make sure that the city knew that the owners didn't live in the residence, so any letters would go to the owners address, rather than to the rental address where the letter might be tossed and ignored.

Marcy

Long, unkempt grass can also attract undesirable insect infestations, rodents and other wildlife to the area. Our Village has a lenient 8" maximum grass length. We keep ours mowed to 5". Long but our grass rarely browns out during the hot and dry points in summer and we have few weeds without using chemicals. Our neighbor mows only when his wife forces him to do so.

The summer I was pregnant with YDS and the mosquito population in our yard directly correlated with the length of the neighbor's grass, I called Code Enforcement. I talked to the wife first, and she said her husband doesn't like mowing but she'd ask him to do better. After 24 hours, I made my call to the Village. I couldn't work in my side yard and flower beds without getting eaten alive. I couldn't take the Benadryl I needed because I react so strongly to the mosquitoes, due to my pregnancy, but I wasn't letting my property look like trash just because neighbor man had an anchor in his shorts. They came out and gave him 48 hours to correct the lawn length and a few other code issues. If they weren't corrected, the Village comes out and corrects them and invoices the homeowner for a fine plus the hourly rate of one of its Village employees to complete the work. I'm about to call again. Our lawn is to the point of needing cut and his grass is easily twice the length of ours. The backyard is even longer. It seems like most people respond to the fear of their laziness costing them money than voluntarily doing the right thing -- maintaining property.

Sorry for the hijack ... mlana that hill of yours use to give Ian a real workout, lol!
Back to topic
Now that our sons are grown and out of the house it's up to my husband and myself to mow. It's not in the budget to hire it out. We live on 3/4acre and have a push mower. I'd love to have a riding mower but again it's not in the budget. It takes several hours to mow, weed whack, and use the leaf blower so our yard work time is done on Saturdays. We usually only do it every other week cause it really takes a chunk out of our weekend physically and socially. We may look fit and able to others but my husband has a bad back and I don't have the stamina to mow the whole yard, we tag team mowing. Occasionally something will interfere with our schedule (rain) and we have to put it off another weekend and by the time the third Saturday comes around it looks pretty rough. I don't particularly like it when it gets that bad but it's unavoidable. I be pretty pissed if my neighbor reported me to authorities before speaking to me first and getting the story. Any reason why you didn't just talk to the neighbors first?

Overgrown grass and weeds will attract pests, rodent or insect. And it does impact property values. If I was in the market for a home, I would be reluctant to buy if the house next door looked like a mess.

I would talk to the landlords.

Talk to the landlord.
Report them to the city.
Done.

If you came knocking on my door, I'd tell you to get bent. You're not the lawn police.

DH is a real estate appraiser. He refused to buy a home that didn't have deed restrictions, at a minumum. The neighbors' care of their yard and home can easily affect the marketability and value of your home. And as someone with irrational fears of rodents, snakes, etc, it would seriously bother me to have a yard like that next door.