If you are using 60/40 coco as medium, what is the other component? If its pearlite then you will need to run your pH lower. There is something about the chemical functions of coco that makes it do better at lower pH around 6.0-6.3, unless you have a different component with the coco that offsets that affect. You will also need to get some calmag additive and begin using with waterings to prevent magnesium deficiency that happens often with coco. I treat my coco with it before planting in it. I also found it necessary to wash and dry my coco to flush out any salts that get left behind in the processing of the coir.
This is the medium Hushpuppy
Its 40% coco, 60% peat and contains both calcium & magnesium at just the right ratio (2:1)
Itll hold a lot of water, since its 60% fine grade Irish peat. For strong rooting, the mix is 40% high grade coco - ithis gives it a light & airy structure.
Its easy to dispose of once used - theres no perlite in Tropic Mix. There are no woody bits either, to help you avoid fungus gnats!
To prevent deficiencies & enhance nutrient uptake, Tropic Mix contains an actual magnesium limestone, a rich source of calcium & magnesium! The coco has been buffered with calcium, too! All Ca & Mg is released slowly so is available to plants over 9 months.
Forget about pH dips or spikes - the peat is treated with lime to raise the pH to 6.5 (ideal). As for the coco, its incredibly stable. The magnesium limestone balances your pH, too!
Overall, the CF is 14 (EC 1.4). You can transplant cuttings straight into the media without shocking or over fertilising plants.
60% fine grade Irish peat (holds a lot of water)
40% high quality coco (light & airy for rapid rooting)
Medium fertilised, strength of CF 14 (EC 1.4)
Highly refined with stable pH (peat treated with lime)
Contains calcium and magnesium (at ideal ratio of 2:1)
No perlite (easy to dispose of)
No woody bits (avoid fungus gnats)
Contains an actual magnesium limestone!(balances pH & adds calcium & magnesium)
Cuttings can be transplanted straight into the media
For first 2 weeks just add water, then on include nutrient too