Bottom Leaves of Young Plant Yellowing

babygro said:

Okay Redgoblin, perhaps I was a bit harsh on you.

Here's the correct way to water your plant -

Use the 'wet/dry' watering method. What that means is - you saturate the plant with water until it runs out of the pot. You fully saturate it - that means making sure the soil is watered fully right the way through. Don't allow too much run off (water out the bottom of the pot) as that will leach nutrients from the soil - it's a balance- just enough, not enough to have a leaching affect. Aim for about 10-20% run off out the bottom of the pot - do not reuse this water - throw it away, it contains plant wastes and has no dissolved oxygen in it.

You then wait to water again until the pot has lost about 80-90% of it's total moisture content - then you saturate again. A good way to tell is the weight of the pot. Feel the weight of an unwatered pot of soil - then feel the weight of a fully saturated pot of soil - there's a huge difference between them.

Cannabis does not like its roots to sit in soggy soil - that can happen if you keep watering small amounts at a time with little run off - also it can create 'dry' patches in the soil which will kill the delicate little root hairs.

Learning and understanding how to water plants is probably the most important thing any new grower has to learn - watering is the key to healthy roots and healthy plant growth. Incorrect watering is probably the biggest cause of new grower problems and ill plant health.

If you can, use a watering can a with a sprinkler rose - this helps to aerate the soil as you water it - it mimics the rain pushing oxygen into the soil with the sprinkling affect.

Don't stick your fingers in the soil to check moisture content - you have no idea what the pot is like 3/4 of the way down - lift it and feel its weight. Top soil can dry out very quickly in warm climates - it's not an indication of the total pot moisture content at all.

Small pots will need watering more frequently than large ones. All pots will need watering more frequently in hot weather than cool weather.

And don't feed your plants anything after you've just repotted - there's plenty of nutrients already in the soil for at least 3-4 weeks healthy growth.

Watch those yellowing leaves and if they start on higher branches you may have to do something about it.

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serj360 said:

My plant is doing the same- the bottom first two cannaboid leaves are turning yellow. On another layer they are turning brown and black on the tips. and on my first layer of real leaves- 5 leafs- one tip is brown.

I used MG organic, mixed with banana peals. PH is fine. 6.5. Mist everyday. 2 CFLs one 40w one 20w- recently added worm castings and espoma dried blood.Also, I mist with jacks classic 20-20-20 1/6 recommended and water with 1/4 recommended.

I think its a defficiency and was thinking about epsom salt. and perhaps lay off the nutes.

I am a complete new grower in need of help. any much appreciated. How do you flush a plant. I want to know all my possibilities before i do anything.

Shes 24 days old.

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dgk4life said:

this thread is almost 2 yrs old bro

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serj360 said:

im just trying to find some info. Been surfing this site for months, great source of info.
fui- i sprayed 1/4 epson salt quart water. mist.

thanks for replying though.

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Lord Dangly Bits said:

Like Franky said. You are watering the plant to much. It never has anytime to get air down in the roots so it can breath. It is much easier to save a plant from under water, then to try and save it from over watering.

Also, only 6"-8" tall in 30 day? Something is wrong for sure.

Here is a picture of a 25 day old plant I have. But I am not useing soil. This set up cost $50 complete ready to use, Nuts and grow medium and all.. MINUS the light.

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