4x4 Grow Trays & Flood Tables
The 4x4 grow tray is the most popular standard size in hobby and small commercial hydroponic growing -- 16 sq ft of inside growing surface that accommodates 9-16 container plants, 2-4 coco grow bags, or a full drip-irrigated sea-of-green layout. A 4x4 flood table paired with a matching Botanicare, Active Aqua, or Fast Fit stand is the most common ebb and flow growing configuration for tent and dedicated small grow room setups. Hydrobuilder carries 4x4 trays and flood tables from Botanicare, Active Aqua, Duralastics, and Flo-n-Gro -- the most widely used brands in this size category.
What Fits on a 4x4 Flood Table
Inside a standard 4x4 tray (approximately 48 inches x 48 inches usable surface): 16 one-gallon containers, 9 three-gallon containers, 6 five-gallon containers, or 4 seven-gallon containers. For drip-irrigated coco bag setups, most commercial configurations run 2-4 large grow bags per 4x4 tray surface depending on bag size. For ebb and flow with rockwool blocks or net pots, a 4x4 table supports a dense planting of 16-36 smaller-container plants. Always calculate container count based on inside dimensions, not outside dimensions -- the usable space is smaller than the outer frame.
4x4 Flood Table Setup: Reservoir & Pump Sizing
For an ebb and flow system using a 4x4 flood table, a 50-100 gallon reservoir provides adequate flood volume with stable nutrient solution buffering. The pump needs to fill the table to 2-3 inches of flood depth within 10-15 minutes -- a submersible pump rated at 300-500 GPH handles this comfortably for a standard 4x4 table. Install an overflow drain fitting set to your target flood depth to prevent overfilling. The table must be perfectly level -- use a bubble level in multiple directions before the first flood cycle and shim stand legs as needed to achieve even drainage from all corners. Pair with a matching tray stand or rolling bench to support the full wet weight of a loaded 4x4 table. Browse our complete ebb and flow systems collection for complete kits including table, stand, reservoir, and pump matched for the 4x4 footprint.
4x4 Grow Tray Brands
Botanicare grow trays are the industry standard for standardized inside dimensions -- the Botanicare 4x4 tray measures true 4 ft x 4 ft inside, making container layout planning straightforward. Active Aqua 4x4 flood tables offer a cost-effective alternative at equivalent dimensions with solid construction. Duralastics and Flo-n-Gro manufacture heavy-duty thermoformed trays with reinforced ribbing for enhanced structural stability under load -- appropriate for container setups where full-tray wet weight is a concern. All are available here with matching stand options. All 4x4 trays are compatible with standard 50-100 gallon reservoirs and submersible water pumps for ebb and flow operation. Fast shipping.
4x4 Flood Tables FAQ
What size reservoir do I need for a 4x4 flood table?
A 50-100 gallon reservoir is the recommended range for a 4x4 ebb and flow flood table. You need enough volume to flood the full table surface to 2-3 inches of depth (approximately 15-20 gallons) with significant reserve volume remaining in the reservoir for stable pH and EC buffering. A 50-gallon reservoir provides approximately 30-35 gallons of buffer above the flood volume, which is adequate for daily flooding across a normal grow cycle. Larger reservoirs (75-100 gallons) give more buffering stability and reduce the frequency of large EC or pH swings between water changes -- worth the additional cost for commercial operations where consistency matters.
How many plants fit in a 4x4 grow tray?
Container count on a 4x4 tray (approximately 16 sq ft inside): 16 one-gallon pots, 9 three-gallon pots, 6 five-gallon pots, or 4 seven-gallon pots. For plant training methods that require more horizontal space per plant (LST, SCROG), fewer plants per tray with more horizontal space per site is standard. For sea-of-green style planting with minimal training in 1-gallon containers, 16 sites per 4x4 tray is the common target.
Does the 4x4 tray fit a standard grow tent?
Yes -- a 4x4 grow tray fits inside a 4x4 grow tent with adequate clearance for the tray rim and stand legs. The tray's outside dimensions are slightly larger than the inside 4x4 measurement (approximately 50-52 inches OD vs 48 inches ID depending on brand), so a 4x4 grow tent with interior dimensions of 48x48 inches requires confirming the tray's OD fits before purchase. Botanicare 4x4 trays are designed to fit standard 4x4 tent interiors; confirm the specific tray's outside dimensions against your tent's interior floor dimensions before ordering. Matching Botanicare stands are sized to match their tray OD dimensions and fit inside the same tent footprint.
