2x8 Grow Trays & Flood Tables for Ebb & Flow Systems
2x8 foot grow trays provide 16 square feet of growing surface in a narrow, linear format -- fitting along a single wall, fitting a 2-foot wide bench run, or creating single-row production lines in greenhouse or warehouse growing operations. The 2x8 footprint is particularly well suited to linear benching systems where rows of plants run the length of a greenhouse bay, nutrient film technique (NFT) channel setups where a continuous linear growing surface is needed, and warehouse growing room layouts where the 4-foot width of a 4x8 tray would create access challenges in narrow growing corridors.
Narrow Format Advantages
The 2-foot width of a 2x8 tray allows growers to reach the center of the tray from either side without stepping into the growing area -- important for greenhouse bench production where access from both sides is limited by adjacent benches. In contrast, the 4-foot width of a 4x8 tray requires reaching 2 feet to access plants in the center from either side, which becomes awkward for tall plants or dense canopies. Two 2x8 trays set side by side with a 12-18 inch aisle between them can cover the same floor area as one 4x8 tray while providing center access from the aisle. Browse our complete grow trays and flood tables collection for all sizes and our ebb and flow systems collection.
Plumbing & Support
2x8 trays use the same flood fitting and overflow drain configuration as larger trays -- one flood inlet and one overflow drain, with the tray slightly sloped toward the drain end for complete drainage. The narrower width makes structural support simpler: a single center support leg or two end legs are typically sufficient for 2x8 trays, whereas 4x8 trays require additional mid-span support. Pair with adjustable grow tray stands for elevated bench setups. Fast shipping.
2x8 Grow Trays FAQ
What is the advantage of a 2x8 tray over a 4x4 tray?
The 2x8 tray provides the same 16 sq ft of growing surface as a 4x4 tray in a long, narrow profile that fits different space configurations. A 2x8 fits along a wall, in a narrow greenhouse bay, or in a corridor layout where a 4x4 would not fit. The narrow 2-foot width allows reaching the full tray width from one side without stretching. For linear growing programs (NFT runs, single-row bench production, propagation lines) the 2x8 format matches the geometry of the production better than a square 4x4.
How many plants fit in a 2x8 grow tray?
Plant count in a 2x8 tray depends on container size and spacing: in 1-gallon pots at 6-inch spacing, approximately 32-48 plants fit; in 3-gallon pots at 12-inch spacing, approximately 12-16 plants; in 5-gallon pots at 16-inch spacing, approximately 8-10 plants. For propagation use with 72-cell flat inserts: two standard 10x20 flats fit side by side in a 2x8 tray, accommodating up to 144 seedling cells per flood cycle.
Can I connect two 2x8 trays to one reservoir for ebb and flow?
Yes -- two or more 2x8 trays can share one flood reservoir by connecting both tray flood fittings to the same pump outlet via a manifold or Y-fitting. Both trays flood and drain simultaneously from the same pump cycle. Verify the reservoir volume is sufficient to flood both trays simultaneously without running dry, and that the pump flow rate is adequate to fill both trays within the flood cycle time. The overflow fittings on both trays should drain back to the same reservoir.
What pump size do I need for a 2x8 flood table?
A 2x8 tray at 1-inch flood depth holds approximately 10 gallons. A submersible pump rated for 200-400 GPH at the head height from the reservoir to the tray surface is adequate to flood a single 2x8 tray within 10-15 minutes -- a comfortable flood window for most ebb and flow programs. For multiple trays on one pump: multiply the total flood volume by 1.5x and select a pump rated to move that volume within the target flood time at the actual head height.
Do 2x8 trays need a stand or can they sit on the floor?
Both options work. Floor-level tray placement is common in greenhouse production where working height is not a priority and where forklift or cart access benefits from low bench height. Elevated stands at 24-36 inches provide ergonomic working height for transplanting, harvesting, and daily plant inspection and allow placing the flood reservoir directly beneath the tray at floor level for gravity drain. Adjustable-height tray stand systems allow choosing working height and accommodate slight floor grade variations that would cause uneven flooding in a floor-level installation.
