An eyeball inspection might be insufficient to accurately diagnose a possible pest infestation. Discolouration of leaves is not enough evidence to jump to conclusions. However, a thorough eyeball inspection will reveal some pests’ presence. Leaf miners will leave telltale tunnels as they eat their way through leaves. If you see white veins running through leaves, it’s time to get some neem oil.
You don’t need to be a shaman or a tree-hugger to communicate with your cannabis plants. You just need to be informed. The leaves on your cannabis plants can send you an SOS, but you must have the knowledge to decode it and take appropriate measures to fix the problem.
Every cannabis cultivator needs to be able to interpret the signals weed leaves send. The grower that can read cannabis leaves correctly will crop healthy plants with fantastic buds. Here is your go-to overview of the weed leaf.
Three kinds of cannabis species are generally agreed upon. Although all three are often lumped together under the official classification of Cannabis sativa L., for practical purposes, it helps to make distinctions between sativa, indica, and ruderalis. That being said, most cannabis you encounter these days is a hybrid. Thus, what you will typically see in the grow-op are weed leaves that express a blend of genetic traits.
Fluctuations in pH are responsible for the majority of yellow leaves. When the water pH is outside of the optimal ranges for your growing medium, the roots cannot access all the nutrients they need. Nutrient lockout is perhaps the most common cause of yellow leaves in cannabis plants.
Indica leaves are short and wide, typically with 7-9 fat fingers. The heaviest indicas of Afghan origin can have oversized, extra-wide fan leaves. Indica leaves are a darker, deeper shade of green. The higher chlorophyll content is believed to accelerate the bloom cycle of indica varieties.
Ruderalis leaves are quite thin and only develop 3-5 slender fingers. Most growers describe them as comparable with the leaves of young sativa plants. Think of them as miniature sativa leaves with fewer fingers. These leaves are special as they have evolved to give autoflowering cannabis the ability to flower independent of the hours of light it receives.
Sativa leaves are long and slender-fingered. Some can develop as many as 13 fingers. Usually, sativa plants will have a lighter, lime green shade. It is believed that the reduced chlorophyll is partly responsible for the longer flowering period of sativa strains.
Weed leaves are key components of the cannabis plant’s life support system. The green pigment chlorophyll allows leaves to act as solar panels for marijuana. Leaves are essential to photosynthesis. Moreover, the underside of leaves are covered in tiny stomata. These microscopic holes open and close like a door. Carbon dioxide goes in, oxygen and water goes out. Furthermore, leaves can also absorb nutrients to feed the cannabis plant, this is known as foliar feeding.
Marijuana is coveted for her resinous flowers. It’s about time the humble weed leaf got some recognition. Let’s discuss the importance of cannabis leaves.
Young cannabis plants display opposite phyllotaxy, with alternate phyllotaxy becoming evident as the plant nears sexual maturity. Whorled phyllotaxy is a relatively common cannabis mutation, and causes three or more leaves to grow from each node rather than the usual two. Along with the extra leaf or leaves, an extra branch is also generated at each node, meaning that plants with whorled phyllotaxy often grow extra bushy!
There are two types of DNA mutations, gene mutations and chromosome mutations. In a gene mutation, the order of bases on a strand of DNA is changed. A chromosome mutation may take several forms: the order of the genes on the chromosome can change; genes can be duplicated or deleted; and genes can even break off of one chromosome and join onto another. The number of chromosomes can also increase in a mutation known as polyploidity (discussed in more detail below).
The “stringy” tendency appears to be present mainly in intensively-bred sativa lines of Southeast Asian or South American background. Stringy strains take a long time to flower, exhibit a high degree of hermaphroditism, and yield very little – but their unique appearance, aroma and effects have won them many fans nonetheless.
Leaf-webbing is considered a useful mutation, as it can successfully be developed into true-breeding strains that are advantageous to growers that wish to disguise their crop, without sacrificing potency.
Another common mutation found in cannabis is polyembryonic seeds. Polyembryonic seeds contain more one seedling, and when germinated, will surprise their owners by putting out two taproots instead of one.
The creeper phenotype is a strange mutation that is generally found in tropical strains, which often grow extremely large, in very humid conditions. Rather than focussing their energy on producing a large central cola, some of these tropical strains grow such large and heavy lower branches that they can bow down to touch the ground. At that point, the branches continue to grow along the ground. In common with many other plants, it may even form new root sites where the underside of the stem touches the ground!
This mutation appears to be extremely rare, and does not seem to have been noted beyond these few anomalous experiments. Beyond its rarity and extremely unusual appearance, the vine characteristic does not appear to be highly advantageous, and no commercial strains have ever been developed.
Phyllotaxy is the botanical term for the arrangement of leaves on a plant stem. The basic leaf arrangements are opposite and alternate (also known as spiral). In the case of opposite phyllotaxy, two leaves originate from the same position on the stem, while in alternate phyllotaxy each leaf originates from a unique point on the stem. Whorled phyllotaxy is an interesting variant where several leaves arise from the same point on the stem.
Cannabis Mutations – Variegation
When cannabis genes mutate, the results can be staggering! All about variegated leaves, buds that grow from leaves, stalks that grow like vines, and more…