Nutrients and problem detection algorithms

A cannabis bush nutrient overview and problem identification algorithm

With the system described in this article, you can easily correctly identify problems in the early stages and save your bush from stress or death.

What do leaves react to cannabis?

• ❗ Lack / excess of nutrients;
• ❗ Lack / excess of light;
• ❗ Stress from cold / heat;
• ❗High/low soil moisture;
• ❗Ph fluctuations;
• ❗Intensive blowing;
• ❗Too bright light;

Algorithm for Finding Problems Related to Nutrients

To use the helper, just start from the first point. When you think you've found your problem, read the section on nutrients to learn more about the problem.

Diagnose very carefully before taking any action on your plants.

1. If the problem only appears at the bottom or in the middle of the plant, then go to step 2 b) If the problem appears in the upper part or on the tops of the plant, then go to step 10. If the problem seems to manifest itself throughout the plant in the same way, then go to item 6.
2. The leaves are equally yellow or light green; leaves wither and fall off; growth is slow. The edges of the leaves do not noticeably curl up.>> Lack of nitrogen (N). b) If not, then go to step 3
3. The edges of the leaves are turned (rolled) up and the tips may curl. The leaves turn yellow (and may turn brown), but the veins are still green.>> Magnesium (Mg) deficiency. b) If not, then go to step 4
4. Leaves turn brown or turn yellow. Yellow, brown, or necrotic (dead) spots, especially on leaf margins, which may also be curled. The plant may be too tall.>> Lack of potassium (K). b) If not, then continue reading.
5. The leaves are dark green or red/purple. Stems and leaf stalks may turn purple and red. Leaves may turn yellow or curl down. The leaf can fall off very easily. Growth may be retarded and leaves may be small.>> Phosphorus deficiency. b) If not, then go to step 6
6. Leaf tips are yellow, brown, or dead. The plant still looks healthy and green. Stems can be soft.>> Overdosing (especially with nitrogen, N), overwatering, root damage or insufficient soil aeration (use more sand or perlite). But sometimes this is a lack of N, P or K. b) If not, then to item 7
7. Leaves curl down like a ram's horn and are dark green, grey, brown or gold.>> Overdose (too much N). b) If not, go to item 8
8. The plant looks drooping even if the ground is damp.>> Overdose, soil too wet, root damage, disease; copper deficiency (very rare). b) If not, then to item 9
9. Plants will not bloom even if they get 12 hours of darkness over a 2 week period.>> The night period is not completely blacked out. Too much nitrogen. Too much cutting or cloning done. b) If not, then to item 10
10. The leaves are yellow or white, but the veins are mostly green.>> Deficiency of iron (Fe). B) If not, then go to item 11
11. The leaves are light green or yellow at the base, while the edges of the leaves remain green. Necrotic spots may be between the veins. Leaves are not curled.>> Manganese (Mn) deficiency. B) If not, then to item 12
12. The leaves are twisted. Otherwise, as in paragraph 11.>> Lack of zinc (Zn). B) If not, then go to item 13
13. Leaves are curled, turning brown or dying. >> Lighting too close to plant. Very rarely it is a lack of calcium (Ca) or boron (B). b) If not... You may have a weak plant.

NUTRITIONS

Carbon, hydrogen and oxygen (organogenic elements) are absorbed from air and water.

The remaining elements, called  nutrient elements , are absorbed from the growing medium, fertilizers, and nutrient solutions.

Classified as mobile and non-mobile:

Mobile elements 

These are NITROGEN, PHOSPHORUS, POTASSIUM AND ZINC.

They are able to change their location, moving from one part of the plant to another.

Non-mobile elements 

These are CALCIUM, BORON, CHLOROCOBALT, COPPER, IRON, MANGANESE, MOLYBDENUM, SILICON AND SULFUR.

They do not move to new areas of the plant, but remain in old leaves.

It is generally accepted that the optimal dosages of macro- and microelements for MJ (mg / l) are as follows:

Vegetation:

• N - 105.5
• P - 52.8
• K - 102.1
• Mg - 90.8
• Ca-59.0

Bloom:

• N - 63.0
• P - 110.0
• K - 172.6
• Mg - 49.5
• Ca-49.0

Elements are able to block (antagonism) each other with an excess of one of them, fundamentally not combine, or complement (synergy):

Remember the necessary pH values ​​​​for optimal absorption of each of the elements:

MACROELEMENTS

Most often, hemp lacks nitrogen. It is needed throughout the life cycle of the plant, but especially during the vegetative stage.

Deficiency - gradual, uniform (along the plane of the leaf) fading and yellowing, death and falling off of leaves.

Transplantation is best tolerated and regular varieties of cannabis do not get sick

All information provided is for informational purposes only and is not a guide or call to action. All materials are taken from the Internet.