Using COCO COIR is rapidly growing in popularity worldwide and it has become the most widely used medium in commercial hydroponic cultivation. It is light, holds large amounts of both water and air and comes in various grades which drain at different rates for particular hydroponic systems. It is inexpensive, reusable and completely environmentally friendly, emanating from a sustainable resource, the husk of the coconut.
It is so popular that growing with COCO has been given its own name, Cocoponics.
COCO COIR is not completely inert and tends to absorb calcium and magnesium ions and release potassium.
The Standard Nutrient Guide and Medical Cannabis
While EHG is a general hydroponic nutrient excellent for most crops, it is perfect for cannabis. The standard nutrient table (on the label of the MICRO bottle and on our website) assumes 18 hours of light, 6 hours of darkness vegetative period and 12 hours of light/ darkness flowering period.
Equal parts of MICRO, GROW and BLOOM are used at increasing strengths in the first stages of vegetative growth. This ensures a balanced spread of essential nutrients. While phosphorus is mainly required for flowering, it is important in the early stages for root development.
Once the lights have switched to 12 hours on and 12 hours off, it takes several days for the plants to convert to flowering mode. In the first two weeks most cannabis strains will “stretch” and during this period less phosphorus is required and more nitrogen and potassium to build a strong structure for bud development. Only MICRO and GROW are fed during this
period. After two weeks budding is very much evident and less nitrogen and high levels of potassium and phosphorus are needed. Only MICRO and BLOOM are fed at this stage. For further information and tips on growing, see the downloadable nutrient guide on our website.
RIPENER is an optional finishing agent similar to BLOOM but with no nitrogen and higher levels of magnesium. Magnesium is needed in increased quantities by many strains towards the end of the flowering period and some growers prefer to reduce nitrogen substantially to promote ripening. RIPENER may be substituted in increasing quantities for BLOOM toward the end of the feed period and can be fed on its own in the second to last week before harvest. (No nutrients at all should be fed in the final week.)
The Nutrient guide assumes an eight week flowering period and a six week feed period.
For longer flowering strains simply extend the feed period accordingly.
Other flowering and fruiting crops likewise follow the standard feeding process of equal parts MICRO, GROW and BLOOM at the early stages of growth. Most crops will auto-flower when they have reached the right age and size. For large plants switch to MICRO and GROW only when the roots are well established. At the first sign of flower buds, switch to MICRO and
BLOOM only. (For smaller plants the MICRO/ GROW only step can be omitted.)
Vegetable greens and herbs which are not being grown for flower or seed don’t need the flowering feed stage. Simply follow the normal program with equal parts GROW, MICRO and BLOOM until your plants are growing strongly and have a well-established root system. Switch to MICRO and GROW only and maintain the correct Ph and EC for the life of the plant
Root crops should remain on equal parts MICRO, GROW and BLOOM throughout their life cycle. (Flush as indicated every 3 weeks and prior to harvest) Maintain Ph and EC at the recommended levels.
EHG Ph up and Ph down are cost effective solutions to keeping your Ph at the required levels.
They are concentrated solutions and more effective than most other Ph control products on the market.
Add relatively small amounts at a time to bring your reservoir to the required level. With practice you will have a fairly good idea of how much Ph up or down is required.
Using EHG nutrients as per the nutrient guide will generally drop water from a neutral Ph of 7 to a Ph of around 6 which is ideal for many plants.
The correct Ph value at which various plants prefer to be grown is determined by the elements which are most important to their growth. It is therefore very important to keep your nutrient solution in the correct range, particularly when growing hydroponically.
Growing in soil is more forgiving but generally better results will be achieved when plants are fed at the
correct target Ph.
In recirculating hydroponic systems (ie. where the nutrient solution is fed back to the reservoir) the Ph will change and must be maintained at proper levels. As the plants absorb either positively or negatively charged ions from the nutrient solution they balance their internal chemistry by releasing either an H+ or an OH- ion to compensate.
Thus the Ph level of the nutrient solution will change constantly depending on what nutrients are being taken up by the plant at any particular time. (Buffering is never completely effective and there is no substitute for proper Ph control.)
As can be seen from the table above various macro and micro nutrients become more readily available to plants at different Ph levels.
(The higher the Ph value, the greater the concentration of OH- ions and the more alkaline the nutrient solution. At a lower Ph value there is a higher concentration of H+ ions and the solution is more acid.)
Get an EC meter and pH meter to ensure the correct pH and Ec for the life of the plant. Contact us for more details.
Please find some quick guides below for more information: