Yellowing of leaves

Ppm is parts per million. It measures how many "contaminenets" or nutrients for us, is in a liquid

I'm bias, but I say pick mine :)

Solid answers below- pick one

Bio-Vega made by Bio-Canna is a simply superb organic nutrient that I can HIGHLY recommend if yellow leaves are a concern, but half strength is plenty, even quarter strength will be enough for the Thai/African cross that Zamaldelica is.

Parts Per Million. (PPM) - the amount of dissolved mineral salts in an amount of water. EC stands for "electrical conductivity", which is another way of measuring (mineral) salt content in water. These two measurement systems are handy for soil-less growing whereby the strength of the applied nutrient solution is critical to a plants health. It does not apply directly to just one nutrient, but the total amount of various dissolved nutrient salts in a specific quantity of water. Since you are growing in soil, just follow the directions on the packet/bottle of whichever products you are using and you won't have to worry about ppm or EC, but in reality, mostly half strength of whatever they recommend is usually plenty strong enough. Congratulations on choosing the awesome Zamaldelica from one of my favourite seedbanks, the mighty Ace Seeds, you will be in for a treat, but expect a slow flowering process, however, the results will be well worth waiting for, I guarantee it! A trip in a bong! Cheers, Organoman.

When people refer to PPM it means parts per million of total dissolved solids in a liquid solution. It can also be said as EC, electric current, EC is more accurate as PPM is calculated using EC but not everyone coverts it the same. It only works on some things dissolve in water but the main nutrients growers use are all detected. so nitrogen, phosphorus potassium, gets em all as mineral slats dissolved in the water. If you in a soil grow and you use compost or manures you will not need to monitor your EC or PPM. If you use liquid nutrients like Advanced Nutrition or General Hydroponics you will do that to the water your about to feed. I grow in a coir living soiless medium and use dry amendments like Gaia Green. I have never once referenced my PPM or EC. It manages it all on its own. Happy Growing!