You are limited in the amount of CalMag that you can provide to seedlings because they cannot tolerate a solution with high Electrical Conductivity (EC). However, you cannot simply increase the dose. This is because the coco is taking the Ca and Mg from the nutrient solution. It is especially difficult to deal with CalMag problems during the seedling stage. The coco will take its share of the calcium and magnesium before the plant has a chance, so if you do not provide enough, the plant will suffer.Ĭalcium and magnesium deficiencies are common problems with plants grown in coco. However, during the grow, more cation exchange sites are continuously exposed, which require additional CalMag. Buffering the coco allows you to satisfy the majority of the cation exchange sites. The buffering process is crucial to prepare the coco for plants, and especially seedlings.Īs I explain in the article, “ Why You Need Cal/Mag in Coco”, the coco itself has cation exchange sites that need to be filled with calcium or magnesium.
#Watering seedlings how to#
Be sure to see our video and tutorial for “ How to Prepare and Buffer Coco Coir”. See example photo timelines of germination and seedling stagesīefore you use coco, it should be properly rinsed, buffered and mixed with perlite.Learn how to treat calcium and magnesium deficiencies in seedlings in coco.Dilute the solution to your daily EC targets.
Use the Coco for Cannabis Seedling Blend.Start fertigation (adding fertilizers to the water) 24 hours after the cotyledons open.Create the right humidity and temperature for seedlings.Flush down the EC before adding seedlings.Buffer the coco to avoid CalMag issues.How to Grow Cannabis Seedlings in Coco Coir The end of the seedling stage is also when you should think about training your plants, so be sure to read our article, “ Why You Should Train Cannabis Plants” and see our training tutorials. You will eventually get to final containers, so be sure to read our recommendations in “Pot Size and Type: The Best Containers for Cannabis in Coco” ( Coming Soon).