Nutrients: Difference between revisions

Nutrients can broadly be categorisedcategorized into Mobile and Immobile. Mobile nutrients are those that the plant can move around to where they are most needed while immobile nutrients cannot be relocated.

Cannabis also obtains Oxygen, Carbon, and Hydrogen from water and air.

Calcium and Magnesium are often sold together in the same product as they both support the creation of chlorophyll in a plant, a requirement of [photosynthesis[Plant_processes#Photosynthesis|Photosynthesis]]

Most deficiencies present as a colourcolor change on the leaves, moving from the centrecenter outwards or from the edge of the leaf moving inwards. Deficiencies can appear on older leaves first or newer leaves first. Mobile nutrient (such as NPK) deficiencies will show on older leaves first as the plant moves nutrients to the younger leaves. Deficiencies will remain in leaves that have already finished growing even after it is remedied in fresher leaves. This means you must be patient in remedying mobile deficiencies

Nutrients can be delivered to the plant when dissolved in water via a fine mist, this is the fastest route of administration. It has been postulated that the size of the droplets has an effect on the efficacy of foliar spray but some studies seem to contradict this<ref>Influence of Droplet Size of Foliar-Applied Nitrogen on Grain Protein Content of Hard Red Winter Wheat 2017 -https://acsess.onlinelibrary.wiley.com/doi/pdf/10.2134/cftm2016.10.0068</ref>. If possible the spray should be applied to the underside of leaves as this is where the most stomata reside. Lights should be turned off before foliar spraying to prevent the light lensing through droplets burning the leaf surface.