Best irrigation systems for greenhouses: 7 kits for benches and containers

A greenhouse irrigation system needs to fit benches, containers, or rows without putting a large outdoor layout in the way. DIG GRWKIT-12 is the closest match for a small protected growing area because the manufacturer describes it as a home-grow drip kit for small greenhouse, grow-area, patio, or container layouts. Its accessible page does not state coverage, tubing length, or emitter count, so measure before buying.

SM50 and SM500 are the spray choices. ML50 and ST100AS are better when the greenhouse has defined lines. FM01AS is a direct fit for potted plants. GE200 makes sense only when the greenhouse is one part of a larger garden layout.

She Gardens used locked manufacturer records and did not test these systems. The greenhouse use cases below come from the product records. A protected space changes evaporation and heat, but the locked research does not provide a universal schedule. Use the kit instructions and check plants yourself.

Greenhouse irrigation comparison

Product	Best fit	Useful evidence	Main drawback
DIG GRWKIT-12 Home Grow Drip Kit	Small greenhouse	Home-grow focus for protected gardens	Capacity is not stated
DIG SM50 Adjustable Micro Sprayer Kit	Small bench	Adjustable spray for benches and pockets	Coverage is not stated
DIG SM500 Adjustable Micro Sprayer Kit	Broader greenhouse area	Spray for greenhouse areas	More exposed than dripline
DIG ML50 Raised Bed Drip Irrigation Kit	Defined rows or beds	Five 10 ft lines; 9-inch spacing	Bed-focused
DIG ST100AS Drip Soak Tape Vegetable Watering Kit	Straight greenhouse rows	100 ft tape; five rows; 12-inch spacing	Needs straight runs
DIG GE200 Drip and Micro Sprinkler Kit	Greenhouse plus garden	50 ft microtube; 20 emitters; 11 sprayers	More than a small bench needs
DIG FM01AS Patio Drip Watering Kit	Greenhouse containers	Up to 10 pots; 60 ft microtube	Limited for benches and rows

Best small greenhouse fit: DIG GRWKIT-12

GRWKIT-12 is the first kit to consider for a small greenhouse or home-grow area. DIG describes it for small protected or container gardens on the manufacturer page. The record does not state exact tubing length, emitter count, or coverage.

That missing capacity information is a real buying limit. Count benches and containers, measure the route from the faucet, and confirm the current package before assuming it will serve the whole greenhouse.

Pros: Direct home-grow focus; suitable for small greenhouse areas; compact starting point.

Cons: Coverage and part counts are not stated; needs a pressurized faucet; less documented than ML50 or ST100AS.

Check the current DIG GRWKIT-12 listing

Best small-bench spray: DIG SM50

SM50 is listed for small beds, greenhouse benches, and landscape pockets by DIG on the product page. Its adjustable spray makes sense when several plants occupy one compact bench area.

The source does not state coverage or included-part count. Spray may wet foliage more than a point emitter, so check whether that pattern suits the plants and the bench layout.

Pros: Greenhouse-bench compatibility; adjustable pattern; useful for small areas.

Cons: Coverage is not stated; may wet foliage; less precise than separate emitters.

Check the current DIG SM50 listing

Other greenhouse choices

DIG SM500

SM500 suits a broader greenhouse area. DIG lists greenhouse areas, landscape beds, shrubs, and trees as compatible uses on the SM500 page. Coverage and included-part count are not stated.

Choose it when one adjustable pattern covers a group. A confined greenhouse may make spray easier to contain than an open garden, but the source record does not promise that result.

Pros: Greenhouse compatibility; adjustable spray; useful for broader groups.

Cons: Coverage is not stated; spray is less targeted; manufacturer does not provide an included-part count here.

Check the current DIG SM500 listing

DIG ML50

ML50 works for a greenhouse with defined short lines. DIG lists 50 feet of 1/4-inch dripline, five 10-foot lines, 9-inch emitter spacing, and up to 150 square feet on the model page. A regulator, filter, backflow preventer, and supply tubing are included.

The bed format is useful for benches with repeated rows. It is less useful for a greenhouse full of scattered pots.

Pros: Five short lines; documented spacing and area; pressure parts included; expansion path.

Cons: Bed-focused; small starting area; line spacing may not match every bench.

Check the current DIG ML50 listing

DIG ST100AS

ST100AS is the row option for a greenhouse that grows in straight lines. DIG lists 100 feet of tape, 0.5 GPH emitters every 12 inches at 25 PSI, five rows, flow control, and five connectors on the manufacturer page.

It is efficient to lay out when benches already use repeated rows. It is a poor fit for a collection of pots with different positions.

Pros: Long tape; five rows; 12-inch spacing; documented flow; connectors and flow control.

Cons: Needs straight runs; less flexible around pots; not a spray or point-emitter solution.

Check the current DIG ST100AS listing

DIG GE200

GE200 is for a greenhouse that shares a source with a larger garden. DIG lists 50 feet of 1/4-inch microtube, 20 1-GPH emitters, 11 micro-sprayers, and up to 700 square feet of coverage on the product page. It can expand beyond 1,000 square feet.

For one small bench, that is unnecessary hardware. For a greenhouse plus nearby beds, the long 1/2-inch tubing and mixed parts may earn their place.

Pros: Large documented area; long supply tubing; emitters and sprayers; expansion path.

Cons: More parts than a small greenhouse needs; spray may wet foliage; requires a broader source plan.

Check the current DIG GE200 listing

DIG FM01AS

FM01AS is the container option. DIG lists up to 10 hanging baskets or pots, expansion to 15, 60 feet of 1/4-inch microtube, 10 pressure-compensating emitters, and a preset 25 PSI regulator with a backflow preventer on the manufacturer page.

Choose it for greenhouse pots, not a full bench of row crops. The count is clear enough to compare, and the limited format keeps the kit from becoming a poor substitute for a larger line system.

Pros: Up to 10 pots; expandable to 15; 60-foot microtube; pressure-compensating emitters; regulator included.

Cons: Container-focused; limited for rows; needs a faucet-fed source.

Check the current DIG FM01AS listing

How to choose greenhouse irrigation

Start with the bench plan. Straight repeated rows favor ST100AS or ML50. Separate pots favor FM01AS or a point-emitter layout. A compact bench with similar plants may suit SM50 spray. GRWKIT-12 is the most direct home-grow match, but its missing capacity details make measuring essential.

Keep tubing off walkways and leave enough access to inspect each emitter. Greenhouse work is close-up work. A system you cannot see behind a bench is harder to correct when a plant dries out or a fitting leaks.

Check the water source and pressure parts. Faucet-fed DIG kits list regulators or filters in different configurations. Do not use the solar AquaBloom assumption here unless the container setup also matches that system’s reservoir design. For an outdoor supply line, the small-space hose guide covers compact hose handling.

A greenhouse with a distant or weak tap may also need the low-water-pressure hose guide and large-garden hose guide for the supply run.

Frequently asked questions

What is the best irrigation system for a small greenhouse?

DIG GRWKIT-12 is the closest use-case match because it is described for small protected or container gardens. Its coverage and part counts are not stated, so ML50 or FM01AS may be easier to size when the layout is defined.

Are micro-sprayers good for greenhouse benches?

SM50 is listed for greenhouse benches, and SM500 is listed for greenhouse areas. Spray can cover a patch, but it may wet foliage. Choose emitters when individual container delivery matters.

Is drip tape useful in a greenhouse?

ST100AS fits straight greenhouse rows. It lists 100 feet of tape, five rows, and emitters every 12 inches. Pots and irregular benches need a more flexible layout.

How many pots can FM01AS water?

DIG lists up to 10 hanging baskets or pots, with expansion to 15. It includes 10 pressure-compensating emitters and 60 feet of microtube.

Recommendation

Choose GRWKIT-12 for a small home-grow area, SM50 for a small bench spray pattern, ML50 for defined lines, ST100AS for straight rows, and FM01AS for greenhouse containers.

Sources and methodology

The locked sources are DIG GRWKIT-12, SM50, SM500, ML50, ST100AS, GE200, and FM01AS. She Gardens did not test these products. The ranking follows the locked irrigation manifest dated 29 August 2026.