Yellow Tips on New Growth

[Pistil_Pete]

Problem:

Medium/grow method: Fox Farm Ocean Forest/ extra Perlite added

Feed: and supplements used: Fox Farm Big Bloom 1/2 strength, Tiger Bloom 1/8 strength, Cal- Mag 1/8 strength

water source: Spring Water, Tap Water

Strain/age: Dutch Passion Blackberry Kush 4 weeks old

light used: Bestva DC series 1000w about 24 inches above canopy



Climate: 77-78f day 71-73f night

Additional info: Have only fed 2 times in the past week, Gave only Spring water until about week 3 and then switched to tap water that was allowed to sit open for 24 hours. Noticed yellowing about 3 days after nutes were 1st given along with the tap water.

 

[Tom Bombadil]

IME usually not an issue...
Generally a bad idea to use bottled nutes with an unknown water source tho. Always best to examine water report and or use a ppm meter to see how high the waters ppm is..
@Mañ'O'Green might have more info..
Ive had this happen before and they usually grow out of it. Could be something as simple as light intensity.
GL :smoking: :smoking: :smoking: :smoking: :smoking: :smoking:

 

[Pistil_Pete]

IME usually not an issue...
Generally a bad idea to use bottled nutes with an unknown water source tho. Always best to examine water report and or use a ppm meter to see how high the waters ppm is..
@Mañ'O'Green might have more info..
Ive had this happen before and they usually grow out of it. Could be something as simple as light intensity.
GL :smoking: :smoking: :smoking: :smoking: :smoking: :smoking:

Thanks for the quick reply!! A quick online search tells me that my tap water is 16 ppm, which is really soft, which is why I gave them a light dose of Cal mag, and last watering I checked my soil PH and it showed 6.3 - 6.6. My tap water is 7.4 without nutes, think I might flush and check my runoff next time.

 

[Pistil_Pete]

I thought it could be light burn as well, but it only seems to be affecting one of my 3 plants, I moved my light up anyway because they are really starting to stretch, all 3 are at 24 inches and my light is 21 inches from the tops.

 

[Tom Bombadil]

I dont think a flush is necessary. Checking ppm is a good idea . runoff should be over well over 1000ppm in ocean forest without any added nutrients.. I wouldnt change anything just yet if at all.. Wait for @Mañ'O'Green to see this before you do anything aside from what youve been doing.
GL!

 

[Pistil_Pete]

I dont think a flush is necessary. Checking ppm is a good idea . runoff should be over well over 1000ppm in ocean forest without any added nutrients.. I wouldnt change anything just yet if at all.. Wait for @Mañ'O'Green to see this before you do anything aside from what youve been doing.
GL!

Yeah, I am just gonna keep doing what I've been doing, they are actually due for a feeding tonight, gonna stay on schedule and keep a good eye on them for any further changes.

 

[Mañ'O'Green]

@Pistil_Pete Welcome to AFN.

Where do these numbers come from?
Feed: and supplements used: Fox Farm Big Bloom 1/2 strength, Tiger Bloom 1/8 strength, Cal- Mag 1/8 strength

Before you try to develop a custom nutrient schedule you need to understand balance and why ALL of the products are in the suggested feed schedule. You are missing the Grow Big?

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

Notice that flushing is only for coco!

Burnt tips is usually an indication of too much nitrogen and/or fertilizer strength or frequency.



Ps get an EC meter 1/8 strength is meaningless.

 

[Pistil_Pete]

Not really a custom feed schedule, just a slight tweak. I didn't use Grow Big as they never showed me that they wanted it, I had dark green leaves and vigorous growth the first 3 weeks, so I only fed water. Once I switched to regular tap water, I gave a small dose of Cal-mag to supplement the tap water a touch. I'm feeding at 1/8th strength because I was seeing burn. I'm just gonna go ahead and stick to 1/2 strength everyother watering from here on out.