
PLANT NUTRIENT MIXES
UltraClean Super Plant Food mixes come as follows:
1. The plant mix, such as a "lettuce" formula. This plant mix contains the micro nutrients (trace minerals),
potassium nitrate, monopotassium phosphate and other key nutrients needed by your plant.
2. The CalMag mix. This contains just three nutrients: Calcium Nitrate, Magnesium Nitrate and Iron
EDTA.
NOTE:
All the nutrients in UltraClean Super Plant Food are water soluble. They are designed, in other
words, to almost completely dissolve in water and stay in solution. After adding them to a water
reservoir, you will need to vigorously stir the water to dissolve the nutrients. Over time, you may notice a
very small amount of un-dissolved nutrients (about 1% of the total nutrient mass) in the bottom of the
reservoir pail. This is normal and not a concern.
As a rule of thumb, you will typically use these formulas together in a 1:1 ratio for more common plants.
However, the ratios and concentrations of these nutrients varies considerably when growing plants that
bloom (such as strawberries or tomatoes). "Grow" and "bloom" cycles of plants have different nutrient
needs, which we will cover later.
Why is the CalMag separate from the general plant mix? Calcium and magnesium often need to be
added in ratios other than 1:1. Keeping the nutrient mixes separated allows you to control the ratios that
you add to the nutrients.
TIP:
If you have multiple grow boxes connected to a single water reservoir, make sure you are growing
all the same type of plants. For example, if you are feeding your water reservoir lettuce mix plant
nutrients, you want to make sure all the grow boxes connected to that water reservoir are growing
lettuce, not something different such as green peppers.
TIP:
Lettuce is the easiest crop to grow, and it's the crop we recommend you begin with. It's also the
most forgiving on nutrient concentrations and ratios.
HOW TO MIX THE NUTRIENTS FOR SEEDLINGS
Target TDS = 1200 + your original water source
Step 1) Measure the TDS of your source water. Using a TDS meter, find out the ppm (which means
the parts per million of Total Dissolve Solids) in your source water. A lower number is better, indicating
"cleaner" water.
Step 2) Add 1200 to that number. This gives you a "target" ppm of TDS in your final water.
Step 3) Add dry nutrients in small quantities in a 1:1 ratio of the plant formula and the CalMag
formula, until the ppm of your water reaches the target ppm. (Make sure you vigorously stir the water
as you are doing this to fully dissolve the nutrients.)
17