Large Capacity Sprinklers for Greenhouse Irrigation
The Melnor 9500-360 is the top pick for most greenhouse owners because it delivers excellent coverage with a metal base that lasts. It suits medium to large greenhouses but requires moderate water pressure to perform at its best.
Keeping a greenhouse properly watered is essential for plant health. Large capacity sprinklers can cover wide areas efficiently, reducing the need for multiple watering sessions.
We compared top-rated sprinklers that offer extensive coverage and robust build. The focus is on models that handle the demands of greenhouse irrigation without frequent breakdowns.
How to pick the right one
The best picks, ranked
Melnor 9500-360
The Melnor 9500-360 is an oscillating sprinkler that covers up to 4,500 square feet. Its metal base adds stability, and the 20 precision nozzles provide even distribution.
Pros
- Wide coverage for large greenhouses
- Sturdy metal base prevents tipping
- Easy to adjust spray width
Cons
- Requires decent water pressure
- Plastic parts may wear over time
Orbit 58322 Zinc
The Orbit 58322 is a brass and zinc impact sprinkler that can handle high water pressure. It provides a circular spray pattern up to a 40-foot radius.
Pros
- Rugged metal construction withstands abuse
- Adjustable arc and spray distance
- Works with high water pressure
Cons
- Moving parts can jam with debris
- Limited to circular pattern
Rain Bird 32ETI
The Rain Bird 32ETI is an impact sprinkler on a tripod base, offering adjustable height and pattern. It covers up to a 32-foot radius with a heavy-duty metal head.
Pros
- Elevated spray gets above tall plants
- Tripod base provides stability
- Adjustable spray pattern
Cons
- Bulky to store when not in use
- Tripod legs may sink in soft soil
Gilmour 5810T
The Gilmour 5810T is a spot sprinkler with a metal spike and adjustable spray heads. It waters a circular area up to a 30-foot diameter, focusing on targeted zones.
Pros
- Precise control over spray direction
- Sturdy metal spike holds position
- Can water specific plants without waste
Cons
- Smaller coverage area
- Requires manual adjustment of heads
Melnor 4000-65
The Melnor 4000-65 is a compact oscillating sprinkler with a metal base, covering up to 2,000 square feet. It has 12 nozzles and two adjustment slides for width control.
Pros
- Suitable for smaller greenhouses
- Metal base offers stability
- Easy to adjust spray width
Cons
- Not for very large areas
- Plastic arms may be less durable
Kadaon Garden Sprinkler
The Kadaon Garden Sprinkler is a 360-degree rotating sprinkler with a tripod stand. It offers three spray modes and covers up to 60 feet in diameter.
Pros
- Adjustable height for tall crops
- 360-degree rotation with multiple patterns
- Tripod base stable on uneven ground
Cons
- Some plastic parts feel less robust
- Requires water pressure to rotate
Trampoline Sprinkler
This Trampoline Sprinkler attaches to your greenhouse frame and provides overhead watering. It covers a wide area with fine spray, ideal for seedlings and overhead irrigation.
Pros
- Leaves floor space clear
- Fine spray is gentle on young plants
- Adjustable arc for targeted watering
Cons
- Requires installation
- May not work with low water pressure
The lineup, side by side
| # | Model | Coverage Area | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | Melnor 9500-360 | Up to 4,500 sq ft | Best overall for large greenhouses | 9.4 | Check price |
| 2 | Orbit 58322 Zinc | Up to 40 ft | Best for durability | 9.2 | Check price |
| 3 | Rain Bird 32ETI | Up to 32 ft | Best for adjustable patterns | 9.0 | Check price |
| 4 | Gilmour 5810T | Up to 30 ft | Best for precision watering | 8.8 | Check price |
| 5 | Melnor 4000-65 | Up to 2,000 sq ft | Best for compact greenhouses | 8.6 | Check price |
| 6 | Kadaon Garden Sprinkler | Up to 60 ft | Best for flexible setup | 8.4 | Check price |
| 7 | Trampoline Sprinkler | Clamp on frame | Best for overhead watering | 8.2 | Check price |
Questions worth asking
What is considered large capacity for a greenhouse sprinkler?
Large capacity sprinklers typically cover more than 2,000 square feet. They are designed to water extensive greenhouse areas efficiently, reducing the need for multiple sprinklers.
Can I use an oscillating sprinkler in a greenhouse?
Yes, oscillating sprinklers are suitable for greenhouses with rectangular beds. They provide even coverage and can be adjusted to water specific widths.
Do I need high water pressure for large capacity sprinklers?
Many large capacity sprinklers require moderate to high water pressure to achieve their full coverage. Check the specifications and your water pressure before purchasing.
How do I know which sprinkler pattern is best for my greenhouse?
Consider your greenhouse layout. Oscillating sprinklers work well for rectangular areas, impact sprinklers for circular coverage, and rotating sprinklers for flexible patterns. Choose based on your plant arrangement.
Are metal sprinklers better than plastic ones?
Metal sprinklers are generally more durable and withstand wear and tear better. In a greenhouse environment with humidity and potential chemical exposure, metal components may last longer.
Can I leave the sprinkler in the greenhouse overnight?
It is not recommended to leave sprinklers running unattended overnight as it can cause overwatering and increase the risk of fungal diseases. Use a timer if you need to water early morning.
How do I clean clogged sprinkler nozzles?
Disconnect the sprinkler from the water supply. Use a pin or a small brush to remove debris from the nozzles. Rinse with water. For mineral deposits, soak in vinegar solution.
What safety precautions should I take with electric sprinklers?
Most sprinklers are not electric; they are water-powered. If you use an electric timer, ensure it is waterproof and placed away from water sources. Always follow the manufacturer’s safety instructions.
Our pick
For most greenhouse owners, the Melnor 9500-360 offers the best balance of coverage, durability, and ease of use. If you have a very large greenhouse with high water pressure, the Orbit 58322 Zinc is a reliable workhorse. For those with tall plants, the Rain Bird 32ETI tripod model provides adjustable height. Choose the Melnor if you want a straightforward, effective solution.
