We recommend to use PK 13/14 always for one week when you use CANNA nutrients. The CANNA base nutrients already contain sufficient P and K during the rest of the cycle. There is a certain period during the flowering stage though, when we can't increase the feed for the plant any more, so we adjust the PK-ratio by adding PK 13/14 for that one week.

Both nutrients are developed for inert media such as rockwool, clay pebbles and many others. CANNA specially developed CANNA AQUA to work in recirculating systems with these inert media. CANNA SUBSTRA should be used when using a run-to-waste system in inert media.

Never use raw rockwool! The pH is too high. Always soak rockwool before using it for the 1st time. Soak with water or a nutrient mixture with the pH adjusted to 5.5 and an EC of about 1.3 mS/cm. 

To ensure good root development the feeding water must be between 68 – 72°F. When it's below 59°F the roots’ capacity to absorb decreases quickly, which results in a smaller harvest.

Light breaks down iron chelates! Because of this, it is very important to ensure that no Ultra Violet light reaches the nutrient solution. Light also causes algae to grow in the nutrient solution, which can lead to blockages. Furthermore, algae can take up nutrient elements and cause nutrient deficiencies to occur.

Make sure rockwool slabs are horizontal. If they are not truly horizontal the moisture will run to one end of the slab. This could mean that some plants become too dry and others too wet.

Keep a record of the amounts of nutrients and additives you add to each tank of nutrients you mix. You then have a good starting point for the next time!

Don’t just measure the EC/ppm of the feed water and the drainage water regularly, remember to measure the EC/ppm of the substrate too.

Take your time diluting and adjusting your nutrient tank! This is essential for the growth, flowering and development of the plants and will yield the best results.

Very high EC/ppm values increase the chance of plant burn, particularly for plants that are close to the light source. In order to reduce the risk of nutrient burn, follow along our recommended feed schedules and adjust as needed for your conditions.

Change from CANNA Terra Vega to CANNA Terra Flores when the flowers begin to develop. Usually this will be after the plants have been lit for 12 hours per day, for between 1 and 3 weeks.

The products designed to adjust the pH are concentrated products. It is sometimes difficult to adjust the pH correctly in one go. To make life easier for yourself, dilute one part pH adjuster with ten parts water and use this to adjust the pH in your nutrient tank.

Check and adjust the nutrient reservoir as follows: Take a reading of the EC/ppm and pH of the nutrient solution and then determine whether there needs to be adjustments. Use the EC/ppm reading to determine if your concentration needs to be higher or lower, based on the values shown in our grow guide. Use the pH value to determine if an adjustment is needed and if so, try to correct the pH value at the first attempt!

CANNAZYM extends the life-span of Clay Pebbles, coco, and other growing mediums because it breaks down dead roots. It can be used to re-use coco medium.

Do you have problems with soil or soilless mixes that becomes compressed and then absorbs water with difficulty? This can be easily overcome by mixing COCO with the mix, which will ensure that it can absorb water easily again. CANNA Terra Professional Plus already contains coco; mixing in more is not necessary.