This is a round 4-tier tray set that equals 113 Sq. Inches, (equivalent to a 10˝" x 10˝" tray) of grow space. BUT it has a 6" footprint! The grow height between trays is 1 9/16" so I like to separate trays into individual planters once the sprouts are large enough.
Each tray = 28Ľ square inches. Start seed in one tray, wait 2 days, another tray. . . Keep the first tray on top and there's continuous fresh sprouts in a 6" footprint.
My average wheatgrass juice yield taken during 40 harvests of each individual tray equals 4˝ fl. ounces! 1 set of 4 trays yields 18 fl. ounces of wheatgrass juice! Cool. I use 2 sets, planting wheat seed daily for a daily harvest (The grass stores extremely well in the refrigerator for a week until as many trays as you want to juice are harvested. Or, grow all at once & . . .)
Love the "Healthy Juicer Wheatgrass Juicer" It comes complete with spare parts for the wear areas!
This system is scientifically designed with high and low rings in the bottom of each tray with drain holes to prevent over-watering of the seed. The roots can rest on top of the ring, or grow down into the bottom if it is hungry for water. Point is that the design makes it very difficult to over-water.
I grew several different types of seed beyond the sprout stage with outstanding success using this system for hydroponics without soil or any soil substitute whatsoever.
The root system interlocks into a mass that holds the plants erect and the 6" diameter supports the root mass; so there is no need for soil or soil substitutes to support the crop. I grew thick robust wheatgrass to 11" harvested it; juiced it and it regenerated a second crop with no messy dirt!
Second growths' will not be as thick as the 1st as some plants die during harvesting. The third growth is not worth it when a fresh, thicker planting of fresh seed will yield much more juice.
I even let green peas, soy beans, and several more seed types grow to around 8" to test the results for soil-less hydroponics growing with success for all seed. No dirt, no mess, better, faster growing, healthier plants. Just add nutrient formula below and watch your sprouts explode!
These trays grow heavy yields, without soil or dirt, and hydroponics is extremely simple. It even allows root inspection and cleaning.
Here is a very effective hydroponics nutrient solution formula:
1 gal. container with tight cap to shake and mix following solution.
4 quarts tap / city water if available (prevents mold, mildew) 337 ppm
Add each item below to 2 quarts water and shake vigorously, add remaining water and adjust pH.
1 good teaspoon Peter's Special or Miracle Grow 100% Water Soluble fertilizer. est.582 ppm
Ľ heaping teaspoon calcium est. 400 ppm (Easy source is Damp Rid)
Ľ heaping teaspoon Epsom Salts est. 150 ppm (magnesium & sulfur)
1 teaspoon household grade USP peroxide. 0 PPM 0 pH change
1 rounded teaspoon Azomite trace minerals (optional) est 10ppm & raises ph 0.5
(pH down acid: 1/16th to 1/8th teaspoon will drop pH est. 0.4 > 0.8 & slightly raise ppm.)
Yields an excellent nutrient measuring approx. 1,500 ppm > 2.000 ppm
Azomite: Read analysis report to decide if you want to use Azomite or not. It has 66 trace ingredients. Azomite is available from Amazon.com and other sources such as sevenspringsfarm.com (best price).
Test pH, adjust to 6.5 to 7.0 for wheatgrass. General Hydroponics pH Down Dry Mix or liquid is an excellent acidifier. Baking soda will raise pH.
Once you have the right pH the wheatgrass is explosive with this formula! Most plants grow in the 5.5>6.5 pH range. In other words, you may need several pH nutrient mixes, depending on your crops. Generally 6.0 is acceptable for most crops.
The Milwaukee Instruments PH600AQ Ph Tester that I purchased from Amazon.com does an excellent job. For valuable crops, also purchase a pH control solution to test your meter's accuracy.
Wheat seed: Approx. 3/4oz. per 10 square inches of growing area. Use 3 - 4 tablespoons (liquid measure) seed for each 6" round tray. Err to the heavy side if your wheat does not have a high germination rate. In other words; adjust seed volume to germination rate of your seed. Low germination rate causes problems. See below about discarding un-sprouted husks & seed.
Sprouting. Soak 4-6 hrs. Use hydroponic nutrient solution. See Tips below about peroxide.
Feeding: When using as a grow tray, each tray will be separated (not stacked), and needs to be put into a suitable collection container to facilitate collection or reuse of the nutrient solution. I use soup bowls to catch nutrient runoff. Use about 3 ounces nutrient each feeding. 3oz. is plenty of liquid to wet the roots.
Provide nutrient as often as appropriate for the heat, humidity and crop size. The tips will lose a little color and may get droopy (depends on crop) if there is not enough water. If your tray drain holes are open and the tray is above the nutrient level it will be very hard to over-water.
TIPS: If you suspect any unsavory condition such as mold, mildew, or odors; simply turn the crop over into your hand and rinse the roots under the faucet and wash loose seed and husks away. Husks cause a lot of mold and rot slime. Replace into the tray, rearrange any awkward plants, feed it generously and watch it grow!
Homemade nutrient is so inexpensive that it is great to mix a fresh batch each planting and use the leftover nutrient on other plants. This saves a lot of monitoring and adjusting pH & EC/TDS because most sprouts and wheatgrass will be harvested within 10 days of initial soak.
CX Hydroponics has a great explanation on pH, EC, CF, PPM.
GO| cxhydroponics.net/faq (The HM COM100 Waterproof EC/TDS And Temperature Combo Meter is an excellent tool to read the EC/TDS/PPM value directly as it automatically compensates for temperature - No need to consult a chart!) Customized and accurate nutrient mixes can be obtained by use of this tool.
Sunflower seed is a 'lettuce substitute" and has a high volume yield and generally an extremely high germination rate.
Wheatgrass harvest: Cut tips off top. Turn over into hand and use scissors to cut sprouts above root line, pick off any husks and weak or discolored plants. Rinse vigorously & put in a glass of water to allow capillary action to swell the blades, shake excess water off & juice, or refrigerate. Root mass can be replaced in tray and 2nd generation will grow, but not as large.
Peroxide is used as both a nutrient additive or cleaning agent that is helpful. Claims are made that the extra oxygen molecule is released, making nutrient solution better for roots & thus growth.