The U-shaped pipe thingy coming out of the ground

Backflow preventer
3"
This cool season favorite in NC:

Tall fescue
The term used to describe this "hard" type of pruning:

Hard or rejuvenation prune
With this classic favorite the more it's pruned the more it flowers.
Rose
Or don't if you want rose hips
This type of sprinkler pops up and sprays.
Pop up spray
The primary material from which designer (dyed) brown mulch is made.
Recycled pallets
This warm season, brown-in-winter, favorite in NC:

Bermudagrass
Ornamental grasses are generally cut back during this season.
Winter/early spring
This southern classic whose name means "water cup":


Hydrangea
This type of sprinkler rotates left and right.
Rotor
The term given to mulch that has been processed three times.
Triple shred
The process of poking holes in the ground usually occurring around October.
Aeration
The term often given to describe this unfortunate pruning tactic on Crape Myrtles:

The term used to describe a flower that completes the life cycle in one year.
Annual
The brain of the irrigation system.
Controller/timer
The best type of pine straw to apply... and definitely not short
Long needle pine straw
Use this herbicide to stop weeds before they start growing.
Pre-emergent herbicide
It's best to wait this many years before hard pruning a new shrub.
3 years (the grow in period)
The term used to describe a flower that dies back after the first frost but returns each spring.
Perennial
The best time to water the landscape.
Early morning
The popular term given to describe this unfortunate mulching habit:

Volcano mulching
Sometimes confused with dry spots this can be a serious issue on summer time fescue lawns.

Brown patch fungus
Trees can be pruned most anytime, but you may have a sticky situation if pruned during this season.
Spring (particularly early)
The best month to install your cool season flowers (and veggies)
October