There are also control products (PGR's = Plant Growth Regulators) that when sprayed on plants (including turf) will slow their growth.
Quite a few different ones - some only meant for ornamentals....some only for turf.
So you have to get the right one.
Here's one for intended for turf, example:
T-Nex Plant Growth Regulator
About this item
KEY FEATURES: Manage growth and improve quality and stress tolerance of warm- and cool-season turf grasses
BENEFITS: Improves rich color, lateral stems and root mass developmen and helps produce healthy, durable blades in turf grass
USE SITES: Turf, Golf Courses
EFFECTIVE AGAINST: Bahiagrass, Fescue, Bentgrass, Kikuyugrass, Bermudagrass, Annual bluegrass (Poa annua), Bluegrass, Ryegrass, Buffalograss, St. Augustinegrass, Carpetgrass, Zoysiagrass
ACTIVE INGREDIENT: Trinexapac-ethyl 12%
LABEL
$132/gallon
Rates are lower for Warm-season grasses - especially St. Augustine, which is what I use it on. Higher on Cool-season grasses, so you'll have to decide whether or not it's worth the trade-off. Plus you need to factor in the labor to apply. Not bad for a small residential yard - but for acreage....you'll need special equipment.