The top disadvantages of drip irrigation come down to five things. Emitters clog. Kits cost money upfront. Tubing gets damaged by tools and animals. You must stay on top of upkeep. Salt builds up in the soil around drip points. Clogging causes the most grief by far.
Drip irrigation problems show up within the first season for most growers. Emitters clog when minerals or bits of organic matter get stuck in the tiny holes. I live in an area with hard well water. My first summer ended with about a quarter of my emitters running at half speed or less. Rodents chewed through two sections of my tubing that same year. One careless pass with a garden fork poked a hole in a line I had hidden under mulch.
Oklahoma State University points to two forces that cause the worst clogs. Hard water leaves calcium and magnesium deposits inside the small emitter paths. Algae and bacteria grow in warm, wet tubing during hot months. These two forces choke off water flow over time. Some emitters stop working all together. The problem gets worse if you skip filter cleaning or use pond water that hasn't been filtered first.
The upkeep is one of the drip irrigation drawbacks that surprises people. You need to clean your inline filter every 2-4 weeks during growing season. Single emitters cost $0.25-$0.50 each to swap out. You might replace a dozen per season in hard-water areas. I now soak my loose emitters in a vinegar bath once a week in July and August. That takes about 15 minutes and keeps most mineral crud under control.
I also learned to walk my lines every Sunday morning during peak summer. I check for chew marks, leaks, and weak drips. This quick 10 minute patrol catches problems early before a whole row of plants dries out. Fixing a small hole with a goof plug takes seconds. Finding a dead row after a week of missed water takes a toll on your harvest.
Stop Clogging Early
- Filter choice: Put a 150-mesh filter at the head of your system to catch grit before it hits any emitters.
- Flush routine: Open end caps and flush your lines for 30 seconds each month to clear out loose bits.
- Emitter type: Pick emitters with self-flushing ports that push out small bits on their own each cycle.
Guard Your Tubing
- Mulch cover: Lay 2-3 inches of mulch over surface lines to block UV sun damage and hide them from tools.
- Rodent mesh: Wrap wire mesh around tubing near fences and garden edges where animals chew most often.
- Flag markers: Stick small flags at tubing spots so you know where lines run before you dig or rake.
Handle Salt Buildup
- Deep rinse: Run a hose over drip zones for 30 minutes twice per season to push salts down and away.
- Soil checks: Test your soil salts each spring with a basic kit to catch buildup before it hurts roots.
- Emitter offset: Place emitters 2-3 inches from plant stems so salt rings form outside the main root zone.
All watering methods have downsides. Drip asks for more hands-on care than a sprinkler you set and forget. But it pays you back with lower water bills and healthier plants when you stick to a weekly upkeep plan.
Read the full article: Drip Irrigation Guide for Home Gardens
