Copper deficiencies are uncommon, but they can cause major problems with your cannabis crop. A copper deficiency will appear initially in the younger leaves with necrosis. The tips and margins of the leaves will exhibit coppery gray or slightly blue discolorations with a metallic sort of glare. In between the veins, the leaves will yellow.
Leaves may also start to wilt, curl, and ultimately die. Indeed, the entire marijuana plant might start to wilt. New growth will have trouble opening up, and the flowers won't mature in males and stigmas won't grow right in females. Copper has low mobility meaning that it isn't permanently fixed to one location, but it doesn't move much.
A surplus of copper is also rare, but certainly fatal. The plant will not be able to use iron (Fe) and its leaves will turn yellow. The roots grow to abnormal sizes and will begin to decay. Download my free marijuana grow bible for more tips about nutrients and marijuana plant deficiencies.
Copper is vital for a number of plant processes like:
- Proper plant production
- Carbohydrate metabolism
- Oxygen reduction
Thus, it's important to ensure that you do not have a copper deficiency or surplus. One way to do that is to use Marijuana Booster, which is designed to not only give you plants a boost, but to ensure that they are getting all the proper nutrients as well. Deficiencies can also be cured with the foliar feeding of copper fungicides like copper sulfate or chelated copper. Natural sources like greensand, kelp, and compost can also help with a copper deficiency.
Feeding the plants with water that has had dimes or quarters soaked in it is also an option. Dimes and quarters are composed of 92% copper.
If you want to start growing, download my free grow guide and order some marijuana seeds. All top quality marijuana seeds are available in my marijuana seed shop. We ship seeds to the US, CA and many other countries. For any growing related question please visit the marijuana support page.