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Old 09-20-2018, 04:24 AM #1
Gio88
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White spots on my leaves

Hi! This my autoflowering royal creamatic, 1 weeks ago these white spots have started to appear on the leaves, may this affect the future harvest? There a way to solve the problem? Thanks
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Old 09-20-2018, 04:57 AM #2
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Cobber, this looks to me like you have a Cal/Mg issue. The white spots may indicate a Calcium shortage. The veins in the older leaves may indicate a Mg shortage. This is typical of young Cannabis plants.

You haven't said how you grow ... but if you're in soil then Dolomite sprinkled over the surface of the soil ... NOT TOO MUCH ... only like sugar on a donut ... then water in and you will soon see changes for the better.

Otherwise the golden centre of the plant shows it is growing well!
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Old 09-20-2018, 05:27 AM #3
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Originally Posted by Gio88 View Post
Hi! This my autoflowering royal creamatic, 1 weeks ago these white spots have started to appear on the leaves, may this affect the future harvest? There a way to solve the problem? Thanks
Some small insect damage.

However I agree and have come to believe that major insect damage may be the result of nutrient deficiencies.

My guess is the roots need more development, which itself also helps solve a lot of nutrient deficiency issues.

And they need a little epsom salt, both for the magnesium - which keeps the leaves nice and green and phototropic - and for the sulfur - which helps produce terpenes - which is one way in which weed protects itself against insect attack.

A little bloom food (0.2 EC to 0.4 EC maximum), a little epsom salt, and they should be fine.

And don't water too often. Roots grow better when the soil is a little dry.
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Old 09-20-2018, 11:57 AM #4
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thanks for the answer! i'm growin indoor with light mh 150w , so i've to add magnesium a little bloom food (can i use biobizz bio bloom even if it's not on a bloom phase?) what can i use to keep away small insects?

ps i posted an update
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Old 09-20-2018, 03:31 PM #5
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thanks for the answer! i'm growin indoor with light mh 150w , so i've to add magnesium a little bloom food (can i use biobizz bio bloom even if it's not on a bloom phase?) what can i use to keep away small insects?

ps i posted an update
Biobizz Bloom is great - the key is that it has relatively higher P levels than N levels.

As long as you get the roots growing, the plant can outgrow all the damage so far, pretty easily.

To discourage insects in the mean time, you can use neem oil as directed, and add just enough liquid dish soap to dissolve the neem oil in water. To really eradicate them, you can add drops of pyrethrin as directed (usually 10 drops to a quart). It is all organically approved, except maybe the dish soap (Castille Soap is completely organic).
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Old 09-20-2018, 04:26 PM #6
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Insects LOVE deficient plants because healthy ones are tougher for them to munch on.


That said,
Those white spots look like light damage to me. Possibly a drop of water concentrated the light on a particular spot on the leaf surface.
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Old 09-20-2018, 05:59 PM #7
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Insects LOVE deficient plants because healthy ones are tougher for them to munch on.


That said,
Those white spots look like light damage to me. Possibly a drop of water concentrated the light on a particular spot on the leaf surface.
it can be! thanks for your suggestions , i'll start to give magnesium and bio bloom to my plats and buy oil neem!
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Old 09-20-2018, 06:19 PM #8
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Do not add epsom to your soil. It will cause lockout issues down the road.


If you suspect a Mg deficiency you can test by adding 1/4 tea spoon Epsom to a gallon of water and giving your lil plant(s) a foliar spray. If Mg is in shortage you will see the plants green up over the next few hours.


As for the Neem. You should determine if you or anybody else that may be using your buds is sensitive to it. It can cause detrimental health issues in sensitive folks.
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Old 09-20-2018, 06:49 PM #9
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at home i have Magnesium pidolate , can i give it to the plant? where i can buy this epsom?thanks
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Old 09-20-2018, 08:49 PM #10
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at home i have Magnesium pidolate , can i give it to the plant? where i can buy this epsom?thanks
Get some epsom salt at the gardening center! Dont use the pidolate. No one knows what this will do. If you are not in the English speaking countries look for Magnesium sulfate (MgSO4). It has probably a different name than Epsom salt in other countries.
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