Air-Pot Containers – #7 (5.4 gal/20.4 L) – Case of 12

The Air-Pot Containers #7 is a 7-gallon-equivalent rigid air-pruning container sold as a case of 12 units. The product title lists the labeled capacity as 5.4 gallons / 20.4 litres; the supplier’s product description and the manufacturer’s published specification both confirm the actual measured volume is 5.6 gallons / 21.1 litres. Each container measures 13.2 inches in height by 13.5 inches in outside diameter (12-inch base) and ships flat with a blue base that identifies it as the #7 size in the Air-Pot range. The perforated HDPE sidewall with alternating inward and outward cones air-prunes roots to eliminate circling, producing a dense fibrous root system that supports faster growth and zero transplant shock.

Air-Pot #7 Container Specifications

The specifications below are drawn from the canonical supplier listing, the Air-Pot manufacturer product literature, and the canonical attributes record. Where the product title and the supplier description give different capacity figures, both are listed below so growers can plan substrate purchases accurately.

Specification	Value
Labeled capacity	5.4 US gallons / 20.4 litres (per product title)
Actual measured capacity	5.6 US gallons / 21.1 litres (per supplier and manufacturer)
Equivalent pot size	7-gallon equivalent
Dimensions (each container)	13.2 in. height × 13.5 in. outside diameter (12 in. base)
Base color	Blue (identifies the #7 size in the Air-Pot range)
Material	Recycled HDPE plastic, manufactured in the United Kingdom
Construction	Perforated sidewall with alternating inward and outward cones
Pack size	Case of 12 containers
Weight (case of 12)	15.0 lb (per canonical attributes record)
Brand	Air-Pot (Caledonian Tree Co., Scotland, UK); distributed by Sunlight Supply
SKU / model number	THAP7
Plant height range supported	2 ft to 6 ft typical; suitable for full-term flowering plants and mother plants
Compatible media	Soil, coco coir, hydroponic substrates

Why Choose the Air-Pot #7 Container

The #7 Air-Pot is the size most growers reach for when finishing a full-term flowering crop, establishing a vigorous mother plant, or transplanting an established cutting into a container it can live in for one to two seasons. At 5.6 gallons of actual volume in a 7-gallon equivalent footprint, it sits in the practical sweet spot for medium-to-large indoor plants and a wide range of outdoor and greenhouse crops. The points below are grounded in the supplier description and the Air-Pot manufacturer’s published product information.

• Air-pruning eliminates root circling for the entire grow cycle. The perforated sidewall with alternating inward and outward cones routes root tips toward open-air perforations. When a root tip reaches air, it dehydrates and stops elongating; the plant responds by branching laterally behind the pruned tip. The result is a dense, fibrous, non-spiraling root mass that uses the full container volume rather than circling against the wall. In a conventional smooth-walled 7-gallon nursery pot, root circling begins within weeks and compounds over the cycle, producing a root-bound plant by harvest. The Air-Pot prevents this entirely from day one through transplant.
• Increases yields and reduces growing time in the garden. The supplier description explicitly lists increased yields and reduced growing time among the documented Air-Pot benefits. The mechanism is the air-pruned root system: a denser, more branched root network supplies more water and nutrients to the canopy per unit of container volume than a circling root system in the same volume. For commercial growers, this translates to either larger finished plants in the same cycle length or comparable plants in a shorter cycle.
• No transplant shock. Because the root system is non-circling and the container disassembles cleanly around the root ball, plants moved from the #7 Air-Pot to a larger container, a final outdoor planting, or a different growing environment do not need to recover from root disturbance. The supplier description states plainly that plants grown in Air-Pots will not suffer transplanting shock. For mother-plant operations and any production schedule where compressed timelines matter, this eliminates the days or weeks otherwise lost to post-transplant recovery.
• Reduces overwatering risk. Drainage occurs across the entire perforated sidewall and through the open web base, not just through a few holes at the bottom. This makes overwatering substantially harder than it is in a closed-wall container, and the constant aeration around the root zone maintains aerobic conditions that support healthy root function. For growers managing dense canopies where humidity around the substrate can stay elevated, the all-surface drainage helps avoid root-zone problems before they start.
• Reusable, recyclable, and ships flat. Each Air-Pot is made from recycled HDPE and is designed to be disassembled, cleaned, and reassembled across many growing cycles. The flat-pack design reduces shipping cost and storage footprint compared to rigid nursery pots that nest but do not collapse. At end of service life, the HDPE material is recyclable through standard plastics streams. For growers running multiple cycles per year, the per-cycle cost drops with each reuse.
• Performs in extremes of weather. The Air-Pot brand has been used by professional growers from tropical climates to arctic conditions and is in service at the Royal Botanic Gardens, Kew, where over 3,000 species have been grown in the system. The rigid HDPE construction does not degrade from UV exposure, freeze-thaw cycles, or repeated wetting and drying the way fabric containers do over time, so growers can leave Air-Pots outdoors year-round in climates that would shorten fabric pot service life.

Best Uses for the Air-Pot #7 Container

The 7-gallon-equivalent Air-Pot is the workhorse size of the range and is well-matched to a specific set of growing applications. The use cases below reflect the container’s physical dimensions, its documented performance characteristics, and the growing contexts identified in the supplier description and the manufacturer’s product literature.

• Full-term flowering plants. A 5.6-gallon container provides enough root volume for a 2-to-6-foot plant to complete a full vegetative and flowering cycle without becoming root-bound. The supplier description identifies the #7 size as a fit for full-term flowering plants and notes that plants can be kept for one to two seasons in this container before transplanting becomes necessary. For growers running indoor or greenhouse photoperiod crops on a single-container cycle, the #7 is the size that most often matches the canopy target without requiring a final upcanning step.
• Transplanting from smaller propagation containers. Growers who start in a propagation cell or a 1-to-3-gallon container and finish in a larger pot will find the #7 a natural intermediate or finishing size. Plants moved from a smaller Air-Pot into the #7 will not suffer transplant shock, which keeps the production timeline tight. For an upstream propagation container, the Smart Pot Black 3 Gallon is a common fabric-pot starting size that pairs well with finishing in a 7-gallon-equivalent rigid air-pruning container.
• Mother plants and cutting production. The supplier description specifically identifies the larger Air-Pot sizes as well-suited for mother plants where high cutting yields are required. The dense, branched root system supports vigorous, sustained canopy growth, which translates to more usable cutting material per harvest cycle. A 5.6-gallon container is large enough to sustain a productive mother for many cutting cycles without the root-bound decline that limits cutting production in conventional pots.
• Establishing larger plants for greenhouse or outdoor production. For growers raising plants that will eventually be planted into the ground or into much larger containers, the #7 Air-Pot serves as an establishment container that develops a transplant-ready root system. Because the root system that develops in the Air-Pot transplants without shock, the plant continues growing immediately upon being placed in its final location, which is significant for short outdoor growing windows or production schedules with tight finish dates.
• Greenhouse, indoor, and outdoor growing. The rigid HDPE construction and weather-resistant material profile mean the #7 Air-Pot performs equally well in heated greenhouses, indoor grow rooms, and outdoor production yards. The manufacturer cites use cases from tropical climates to the arctic circle. For indoor growers, the 13.5-inch outside diameter fits in standard grow-tent footprints and on most commercial flood-and-drain benches.
• Soil, coco, and hydroponic substrates. The supplier description confirms the Air-Pot is compatible with soil, coco coir, and hydroponic applications. This versatility makes the #7 a single-container solution that can move across substrate types as a grower’s production setup evolves, eliminating the need to maintain separate container inventories for soil and soilless systems.

Air-Pot #7 vs. Fabric Pots and Conventional Nursery Pots

At the 7-gallon size point, growers typically choose between three container types: a rigid air-pruning container such as the Air-Pot, a fabric pot such as the Smart Pot line, and a conventional rigid plastic nursery pot. All three are widely used, but they differ in air-pruning mechanism, structural behavior, longevity, and root-system outcomes. The comparison below highlights the practical trade-offs most relevant at the 7-gallon scale.

Air-pruning mechanism. The Air-Pot uses a rigid HDPE sidewall with precisely engineered cone-shaped perforations. Root tips grow into the outward-facing cones, contact air, and are pruned at defined geometric points around the circumference of the container. The pruning effect is uniform and repeatable across every unit. Fabric pots achieve air pruning through porous fabric walls: roots grow until they contact the fabric, where air exposure dehydrates and prunes the tip across the entire surface area. Conventional rigid nursery pots have no air-pruning mechanism at all; roots reach the smooth wall and begin circling immediately. Between the three, the Air-Pot and fabric pot both produce branching, non-circling root systems; the conventional nursery pot does not.

Structural rigidity. The Air-Pot holds its shape whether empty or filled. This matters during routine handling: a rigid 7-gallon container can be lifted by the rim, moved between staging areas, and watered without deforming or tipping. Fabric pots are soft-sided and can sag, fold, or tip when partially full, particularly with lighter coco-based media. Conventional rigid nursery pots match the Air-Pot on rigidity but provide no air-pruning benefit. For growers moving plants frequently or running automated irrigation that requires consistent container positioning, the Air-Pot’s rigidity is a practical day-to-day advantage over fabric.

Longevity and reusability. The Air-Pot is made from recycled HDPE that does not degrade from UV exposure, soil contact, or repeated wetting and drying. With routine cleaning between cycles, an Air-Pot can serve for many growing seasons. Fabric pots are reusable but degrade gradually as the fabric thins, and most are rated for a limited number of seasons before they need to be replaced. Conventional nursery pots are durable but offer no root-quality benefit to amortize over their service life. For growers running multiple cycles per year, the Air-Pot’s longer service life and consistent performance over many reuses offset the higher initial unit cost relative to fabric pots and conventional plastic pots.

Flat-pack storage between cycles. The Air-Pot disassembles into a flat wall section and a base, which stack compactly between cycles. Fabric pots also fold flat. Conventional rigid nursery pots nest but do not collapse and therefore consume more storage volume between uses. For growers with limited off-season storage space, both the Air-Pot and fabric pot meaningfully outperform conventional plastic on storage efficiency.

Drainage and root-zone aeration. The Air-Pot’s perforated sidewall and open web base drain across the entire container surface. Fabric pots also drain through their entire surface. Both dramatically outperform conventional plastic nursery pots, which drain only through a small set of bottom holes and are far easier to overwater. The Air-Pot’s open structure also promotes lateral airflow into the root zone, which supports aerobic root function and reduces the risk of anaerobic pockets in the substrate.

Per-unit cost. The Air-Pot has a higher per-unit cost than a comparable fabric pot or conventional nursery pot in the 7-gallon size. The cost differential is offset over time by the Air-Pot’s longer reusable service life and by the production benefits (faster cycle times, larger finished plants, no transplant shock) that the air-pruned root system delivers. Growers running a few seasons of casual production may find a fabric pot economical for the case quantity; commercial growers running many cycles per year typically find the Air-Pot’s amortized cost per use lower than either alternative.

Compatibility & Operating Range

The Air-Pot #7 is compatible with a broad range of growing media, environments, and cultivation methods. Compatibility information below is derived from the supplier description, the manufacturer’s published product data, and standard air-pot horticultural practice.

• Growing media. The supplier description confirms the Air-Pot is compatible with soil, coco coir, and hydroponic substrates. The open web base and perforated sidewall drain freely regardless of media type, so media selection should be driven by the grower’s irrigation method and crop requirements rather than container limitations. For soil-based growing, a quality peat-based or living-soil potting mix works well at the 5.6-gallon volume. For coco coir applications, both buffered and unbuffered coco are compatible; the rapid drainage makes frequent fertigation events practical. For media storage and mixing between batches, an airtight Gamma Seal Lid keeps prepared substrate dry and ready for the next fill cycle. Very fine particle media (pure vermiculite, fine sand) may sift through the base perforations; mixing with a coarser component eliminates this. For high-organic-matter soils, the dense root system that develops in the Air-Pot uses available nutrients efficiently and benefits from a quality mycorrhizal inoculant such as Pro-Mix HP with Mycorrhizae as a base substrate.
• Fertilizer programs. The recycled HDPE construction is chemically inert and is compatible with all standard liquid, granular, organic, and slow-release fertilizer programs. The rapid drainage through the sidewall and base means fertilizer solution passes through the root zone efficiently, so growers should account for slightly higher runoff rates than in a closed-wall container when calculating feed schedules and target EC. Salt buildup in the substrate is naturally lower because of the continuous drainage and aeration.
• Indoor, outdoor, and greenhouse environments. The #7 is suitable for indoor grow rooms, grow tents, commercial greenhouses, and outdoor production yards. The manufacturer states their products are in service from tropical to arctic conditions. The 13.5-inch outside diameter fits in standard 4-by-4 and larger grow tents (single plant) and on common flood-and-drain bench layouts.
• Irrigation methods. Hand watering, drip irrigation, flood-and-drain, and recirculating fertigation systems are all compatible. Because the container drains across its entire surface and cannot retain standing water in the substrate, irrigation frequency should be slightly higher than for a closed-wall container of the same volume, particularly in warm, dry, or high-airflow environments. Drip emitters are best placed in a ring rather than a single point to distribute water across the substrate volume evenly.
• Transplanting compatibility. Plants can be transplanted out of the Air-Pot #7 into any larger Air-Pot size (such as the #15 or #20), into other container types, or directly into the garden or production field. The manufacturer states that plants will not suffer transplanting shock. To extract a plant, remove the fixing screws holding the wall section together, unroll the sidewall away from the root ball, and lift the plant and root mass free from the web base. The non-circling root system does not require scoring, loosening, or any disturbance before planting in the new environment.
• Outdoor weather range. The recycled HDPE material is UV-stable and freeze-thaw tolerant. Air-Pots can be left outdoors year-round in temperate, hot, or cold climates without material degradation. For overwintering plants in cold climates, the open sidewall does mean substrate temperatures track ambient air temperatures more closely than in a closed pot, so growers in zones with hard freezes may want to mulch or insulate the outside of the container or move plants to protected storage during deep cold.

Usage Guidelines

The Air-Pot #7 is straightforward to use, but a few specific considerations follow from its open, perforated construction. The notes below cover the most common adjustments growers make when transitioning from conventional rigid nursery pots or from fabric containers.

Watering frequency. The perforated sidewall and open web base drain substantially faster than a conventional solid-walled 7-gallon nursery pot. This means the growing medium dries out more quickly, and watering frequency should be higher than for a closed container of the same volume. In a typical indoor environment with moderate temperature and humidity, plants in a #7 Air-Pot may need watering every one to three days during peak vegetative and flowering growth, compared with every three to seven days in a conventional pot of the same volume. Check moisture at the substrate surface and several inches deep before each irrigation event; the air-pruned root system colonizes the substrate uniformly, so moisture is taken up evenly across the container volume.

Substrate volume and weight when filled. A filled 5.6-gallon Air-Pot weighs approximately 30 to 55 pounds depending on substrate type and moisture content (lightweight coco at field capacity sits at the lower end; saturated peat-based soil at the upper end). Plan staging and lifting accordingly, particularly if plants will be relocated between vegetative and flowering rooms or moved outdoors during finishing.

Substrate selection. For full-term indoor flowering, a peat-based or coco-based potting mix amended for the grow style works well. For organic and living-soil growing, a quality compost-amended soil performs well; the abundant aeration suits the microbial activity that drives living-soil systems. For coco-only and hydroponic applications, buffered coco coir or coco-perlite blends are standard. For all substrates, avoid filling to the absolute rim; leave roughly half an inch of headspace to facilitate watering without overflow.

Mulching the surface. Because the sidewall is open, water and humidity at the substrate surface evaporate faster than in a closed pot. Growers in dry indoor environments or hot outdoor climates often top-dress with a coarse mulch (straw, bark chips, or coarse coco) to slow surface evaporation and stabilize substrate moisture. This is optional but commonly helpful in arid conditions.

Cleaning and reuse between cycles. After each cycle, remove the fixing screws, unroll the wall section, and separate it from the base. Shake out spent media and root mass. Rinse all components with clean water. For more thorough cleaning between cycles, soak the components in a dilute hydrogen peroxide solution (3% concentration) for 15 to 20 minutes, rinse, and air-dry. Inspect the wall perforations for any clogging from compacted root material or substrate and clear blocked holes before reassembly. The recycled HDPE does not degrade from repeated cleaning.

Storage between cycles. The Air-Pot stores flat. After cleaning and drying, stack the wall sections and bases separately in a dry location away from direct sunlight to maximize the material’s service life. A case of 12 cleaned and disassembled Air-Pots takes up far less storage volume than 12 assembled rigid nursery pots of the same capacity.

How to Assemble and Use the Air-Pot #7 Container

Each Air-Pot #7 arrives as a flat-pack kit. No tools are required for assembly; only the supplied fixing screws and a moment of hand-tightening are needed. The steps below describe assembly, filling, planting, and end-of-cycle disassembly.

1. Lay out the components. Remove one wall section and one blue base from the case packaging, along with the fixing screws. The wall section is a flat strip of perforated HDPE with alternating inward and outward cones across its surface. The base is a circular blue disc with a recessed channel that seats the lower edge of the wall.
2. Form the wall into a cylinder. Curl the flat wall section into a cylinder approximately 13.5 inches in outside diameter, with the outward-pointing cones facing outward. Overlap the two ends of the wall strip so the screw holes on one end align with the screw receivers on the other end.
3. Secure with the fixing screws. Insert the supplied screws through the aligned holes and hand-tighten until the cylinder holds its shape firmly. No tools are needed. The screws should be snug enough that the wall does not unroll under load, but overtightening is unnecessary and can deform the HDPE.
4. Attach the blue base. Place the blue base on a flat surface with the channel facing up. Press the assembled wall cylinder into the channel, working around the circumference to seat the wall evenly. Press firmly until the base seats fully into the lower edge of the wall section. The assembled #7 Air-Pot should now stand upright on a flat surface and feel solid when lifted by the rim.
5. Fill with growing medium. Add pre-moistened growing medium (soil, coco coir, hydroponic substrate, or a custom mix) to within approximately half an inch of the rim. Settle the medium by tapping the container gently on the work surface or lifting and dropping the container several inches onto a level surface. Avoid compacting the medium by pressing down hard, which can reduce air-filled porosity and slow root development. Leave headspace at the top for watering.
6. Transplant or plant. For transplants from a smaller container (such as a 1-gallon or 3-gallon propagation pot), create a depression in the center of the filled #7 equal to the size of the incoming root ball. Remove the plant from its previous container, place the root ball in the depression, and backfill around the edges with additional medium. Firm gently around the stem and water in thoroughly. For direct seeding or rooted cuttings, plant at the appropriate depth for the species and water in lightly.
7. Place in the growing location. Set the planted #7 Air-Pot in its final growing location: indoor grow tent or grow room floor, greenhouse bench, flood-and-drain table, or outdoor staging area. Because the container drains across its entire surface, place it on a surface that can handle drainage water (a saucer, a tray, a drainage mat, or a gravel pad). Water as needed to maintain even substrate moisture; the perforated wall will drain excess automatically.
8. Manage the grow cycle. Monitor watering frequency closely during the first two weeks as the plant establishes in the new container; the faster drainage of the Air-Pot may require more frequent irrigation than the previous container did. Apply fertilizer per the chosen feeding program. As roots develop, you will see root tips emerging at the wall perforations, which is normal and indicates the air-pruning effect is working. The container holds the plant comfortably for one to two seasons of growth or through a full flowering cycle.
9. Harvest and disassemble. At end of cycle, harvest the plant. To disassemble, remove the fixing screws, unroll the wall section away from the root ball, and lift the plant and root mass free from the blue base. The intact root ball can be composted, the root mass can be shaken off for re-use of the substrate, or the entire root ball can be replanted in a larger container or directly in the garden. Clean all three components (wall, base, screws) per the usage guidelines above and store flat for the next cycle.

Sources & Further Reading