Is emerald ash borer in Highlands Ranch?
No. It has not been confirmed in Highlands Ranch. The first confirmed Douglas County detection was in Parker in 2026. Some regional reporting has used loose geography that reads as though Highlands Ranch is a detection site — it is not, and we are not going to tell you it is to sell you a treatment.
Why do so many trees on my street look bad at the same time?
Because they were almost certainly planted at the same time. Highlands Ranch was shortgrass prairie until construction began in 1981, and 84% of its homes went up between 1980 and 2009. Trees of the same species planted in the same years hit the same size, the same structural weaknesses and the same end of life together. It is not your imagination and it is not a coincidence.
Do I need HOA approval to remove or replace a tree?
Check your own covenants, because the HRCA governs private landscaping through the Architectural Committee. What the HRCA publishes is that approval is required for things like less than 50% sod in a yard, xeriscaping plans, hardscape, grade changes and properties adjoining open space — and that it is not required for “replacing dead or dying landscape elements with the same type of landscape elements.” We are not your HOA and cannot approve anything; ask them first.
Who maintains the trees along the roads and in the parks?
The Highlands Ranch Metro District, which maintains more than 14,500 trees in parks and along roadways. Its Forestry Supervisor is Caleb Palmer, 720-240-5915. Trees on your own property are not part of that programme. If you are unsure where the line falls on your lot, that is one of the first things we sort out at the assessment.
Can I water my trees under the Stage 1 restrictions?
Yes. Drip irrigation and hand-watering with a shut-off nozzle are allowed any time under Highlands Ranch Water’s Stage 1 rules. Sprinkler days are assigned by address — odd Wednesday and Saturday, even Thursday and Sunday — with nothing between 10 AM and 6 PM from May through September. The tree exemption is the part most people never read, and it is the part that keeps a mature tree alive through a dry autumn.
Is the turf replacement rebate still available?
Not for 2026. Highlands Ranch Water states that all rebate funding for 2026 has been exhausted and the programme reopens 1 March 2027. If you were planning an autumn lawn conversion, that is worth knowing before you start. It is also worth thinking about what the turf was doing for the tree beside it, because rock over fabric right up to a trunk is hard on a root zone.