4’×4’ Grow Trays & Flood Tables
A 4×4 grow tray is one of the most popular configurations in indoor horticulture — matching the 4×4 footprint of standard grow tents, fitting neatly on single tray stands, and holding enough plants for a productive hobby or small commercial grow. The 4×4 flood table size is the backbone of most ebb and flow setups in home and smaller commercial operations.
4×4 Flood Tables from Active Aqua & Botanicare
Hydrobuilder stocks 4×4 flood tables and grow trays from Active Aqua and Botanicare — two of the most widely used tray brands in the industry. Botanicare 4×4 trays maintain true inside dimensions (ID) engineered to hold standard growing containers and net pots without wasted space. Active Aqua trays are constructed from heavy-duty ABS plastic rated for the repeated flood cycles and load of a fully planted system. Both are available in standard black colorways; white interior trays reflect root zone light for improved root visibility and algae management. For a 4×4 flood table in an ebb and flow system, a reservoir of 50–100 gallons is recommended to ensure adequate flood volume and a buffer for pH and EC stability.
ID vs. OD: Understanding Tray Dimensions
Grow trays are listed with inside dimensions (ID) or outside dimensions (OD). When selecting a tray for a stand, the OD must fit within the stand frame dimensions. The ID tells you how much usable growing space is inside — how many containers, net pots, or rockwool slabs actually fit. A 4×4 tray with true 48×48 inch inside dimensions fits 4 to 9 plants depending on container size and spacing. Always confirm ID specifications before purchasing containers or grow media to avoid spacing problems in your setup.
Pair your 4×4 flood table with a matching rolling bench or tray stand, browse ebb and flow systems for complete flood and drain setups, or explore all grow tray sizes if 4×4 isn’t the right fit. Commercial accounts available.
