1. National Greens

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Hermosa Beach, CA

National Greens

4.8 (17 reviews)
Closed • 8:00 am - 5:00 pm

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Services - National Greens

Construction or installation

Disease management - shrubs

Gardening

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Review Highlights - National Greens

“Bob, a landscape designer/contractor was very professional, really easy to work with and motivated to do his best.”

Mentioned in 15 reviews

Read more highlights

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Frank's Artscaping - New seeded grain growing really good after we upgraded irrigation sprinkler for maximum coverage and water efficiency.

Frank's Artscaping

(34 reviews)

I waited a month after Gilberto finished fixing my irrigation because I wanted to show the green…read moregrass that had been hiding from lack of water from my sprinklers for nearly a year. Long story, we had a bad irrigation person install our sprinklers in 2018. He totally overloaded the valves and also used cheap sprinklers so while they worked initially, apparently when the city reduced the pressure to homes, the sprinklers dropped in pressure significantly which then resulted in lack of coverage. So in 2021, I hired a highly rated irrigation specialist who charged me over $2,500 to supposedly fix my sprinklers which again kinda worked but after 6 months which was within the warranty, he was nowhere to be found so I had coverage issues again. but because of COVID , I took to hand watering the gaps as an activity and was able to keep things going. Fast forward to 2025 and not only was the coverage bad but the city must have reduced the pressure again so now none of the front sprinklers for the lawn could even pop up so I had to hand water the entire front lawn 2-3 times a week. This was getting to be too much but I struggled to call another irrigation company because I was worried I would be bamboozled again and we can't afford that but I just couldn't hand water forever and we even thought of going drought resistant which we are not a fan off so I did a ton of research to try to find another company that I could trust. I reached out to 3 companies and Gilberto (Gilbert) was the only one who identified the issue that my entire system was on sprinklers that were not pressure regulated which is now the current standard in California. Plus the others proposed significantly more invasive and cost prohibitive solutions. I don't know the technology but essentially the pressure regulated sprinklers helps add pressure so when the water pressure is not strong, it gives it a boost. This helps conserve water and I was floored by Gilbert offering to come and install a few to test it out for effectiveness and he even gave me a guarantee that if it didn't work, I didn't have to pay. Can you believe that? Well he came as he said he would, installed a few and the difference was amazing! So then we decided to fixed all the sprinklers in this same manner and one day , he texted me to say he had been thinking about our project and he wanted to share that there was a chance the fix may not work because we had 40 sprinkler heads on one valve. ( the max should be 8-12). Well we then discussed options and because of how genuine and knowledgeable Gilbert was, I put my trust in him and he implemented his plan. And voila! It now works and he even fertilized my grass afterwards to help it along and the photos say it all and as much as I love my garden, I am happy to have 3 hours a week back that Im not hand watering. Plus, he heard me complaining about how one sprinkler head was blocked by a plant and next thing I noticed, he added a riser. That wasn't even in our scope of work. And Gilbert has followed up 2 times in the last month to just see how things are going. I feel valued and he clearly takes pride in his work and cares about his customers and wants to have long term relationships. It's hard to find honorable and capable people these days but I finally found my irrigation prince after the frog.

I had an urgent sprinkler repair because the pipe that connects the main to the sprinkler box was…read moreleaking, so we had to shut off the water main to the whole house. I reached out at 5:15p on a Fri and he was at my house by 6:10p! I was so appreciative of his responsiveness, fast diagnosis and thorough repair. Despite having to leave to go get the parts, he was able to return and fix everything by 8p! I appreciated how hardworking their family owned company is. They really went above and beyond. I will wholeheartedly recommend them to all my friends!

Helix Landscape Construction - no grass, roundup sprayed here

Helix Landscape Construction

(27 reviews)

We had a particular vision for the re-landscaping of our front yard, but it posed some engineering…read morechallenges. We had a designer develop a conceptual plan, but it did not fully address the engineering issues. When we met John Arney at Helix Landscape Construction, we knew we'd found the right person and the right company for the job. Sloping below street level, our front yard posed an interesting challenge to keep rain runoff out of our sump system as much as possible. The design incorporated the concept of a rocky swale to collect runoff, but John engineered all the details to including french drains to direct runoff into the landscape to re-charge the local water table for the signature bonsai tree and other plants envisioned in the plan. Throughout the project, John took the time to understand our aesthetic for the yard, and provided advice on so many details as it took shape. He traveled with us to rock yards and specialty nurseries to help find the perfect elements. John brought both great design ideas and the technical know-how we needed to make our vision a reality. Over the course of the two weeks he spent with us, I felt he truly became our partner in the project, which made it a pleasure to work with him and his team. As for execution, John's team was efficient, conscientious and respectful of us and our neighbors. The project was completed on time, despite discovery of a massive root system left behind from a previous tree removal, and many other tweaks to the effort made along the way. We are thrilled with the results and would recommend John for any landscape project you might have.

I hired Helix again to do additional design and landscaping at our home in Redondo Beach and once…read moreagain they delivered! Creative, great ideas, really nice people & they cleaned up each day. Great value all around!

National Greens - landscaping - Updated November 2026

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