What's new

Advanced Techniques & Problems

The best tips from industry pros and experienced growers. If you're looking to tackle problems with your cannabis grow or take your weed grow to the next level, you can learn about it here.

Sort by: Views Descending

Filters

What CO2 PPM should I use 6 weeks flower and beyond

OGONLY
Nov 28, 2010

Replies: 24

Views: 23K

Dec 5, 2010

plantevil

Kill pm with uv light???

iliketolearn
Mar 4, 2010

Replies: 23

Views: 23K

Jan 3, 2017

GT21

Replacing air stones with waterfalls in RDWC

ttystikk
Nov 6, 2013

3 4 5

Replies: 99

Views: 23K

Jul 31, 2014

HottyToddy

The Secrets Of Foliar Spraying

Samoan
Jun 8, 2017

Replies: 11

Views: 22K

Oct 29, 2018

crisduar

When to start CO2?

ColasQueen
Mar 1, 2011

Replies: 14

Views: 22K

Oct 26, 2019

Itsnotfree

Cloning with RapidRooters!

cheaplastic
Jan 31, 2010

2 3

Replies: 50

Views: 22K

Dec 26, 2011

MendoCruz

Scorpion Juice knockoff

budboy299
Mar 3, 2011

Replies: 36

Views: 22K

Aug 4, 2021

TheItalianKind

Problems with GO CaMg+ vs Botanicare Cal-Mag?

Seamaiden
Jul 26, 2010

2 3

Replies: 56

Views: 21K

Sep 23, 2010

happyinmendo

Locked

The Bonsai Mother Technique..

EventHorizan
May 30, 2017

Replies: 13

Views: 21K

Aug 30, 2017

DetGrnThumb

Drying Your Plant Directly In The (soil/pot) That It Stands In.

rmoltis
May 15, 2016

Replies: 17

Views: 21K

Jul 6, 2022

ArealBoy

Double potting Smart Pots?

Texas Kid
May 22, 2012

2 3 4

Replies: 70

Views: 21K

Jun 21, 2018

CaliDrewski

grow tents and odor

ohthatguy8
Apr 7, 2014

Replies: 21

Views: 21K

May 1, 2014

QLTYlab

Purple, Red & Green Weed: A Guide To Your Bud Colors Using Ph To Control Your Fade

jumpincactus
Sep 6, 2017

Replies: 23

Views: 21K

Jun 20, 2018

PharmHand

Just switched my hps for mh for the last week of flowering

bobman
Jun 29, 2010

2 3 4

Replies: 63

Views: 21K

Apr 7, 2016

john martin

Getting greener--substitute for perlite

Seamaiden
Oct 31, 2010

Replies: 22

Views: 21K

Nov 24, 2010

ookiimata

extreme topping as in cutting off whole top plant.

chillin hard
Jul 2, 2010

Replies: 10

Views: 21K

Dec 18, 2020

RevRhino

Running a 12-1 light cycle for vegging

kolah
Feb 23, 2014

2 3

Replies: 51

Views: 21K

Dec 16, 2016

Psychonaut47

Methods For Sealing Marijuana (smell Proof)

OrganicPro
Dec 7, 2017

Replies: 30

Views: 21K

Jul 16, 2019

Kraken.headz

more on jasmonate usage

salmonslammer
Apr 9, 2012

2 3

Replies: 53

Views: 21K

Feb 25, 2020

MIMedGrower

day to in EZ Clone 120-stems shrinking & turning brown

Critical Kid
Oct 1, 2010

Replies: 20

Views: 20K

Apr 14, 2013

stevebeast

Smart Pots?

zooted
Jul 26, 2009

2 3 4

Replies: 61

Views: 20K

Jan 27, 2011

pure arghan

Powdery Mildew

JJP53
Jun 10, 2011

6 7 8

Replies: 143

Views: 20K

Jun 22, 2014

Seamaiden

help 5 weeks into flower and small buds

hydrotran
Jul 9, 2011

Replies: 22

Views: 20K

Jul 11, 2011

hydrotran

My ez clone officially sucks

legaleyes13
Apr 19, 2014

3 4 5

Replies: 95

Views: 20K

Dec 22, 2014

Kdub

Poll

Decreasing Light For Increased Trichome Prodution

paulycali
Feb 14, 2012

Replies: 33

Views: 20K

Aug 27, 2021

PipeCarver

Poll

Do 'You' Flush In Hydro?

hererisssh
Oct 11, 2008

Replies: 36

Views: 20K

Feb 2, 2009

TheNman

gravity

stickyickyicky
Mar 5, 2010

3 4 5

Replies: 83

Views: 20K

Oct 8, 2011

jyip

Finally! An organic pH up--Humax

Seamaiden
Aug 23, 2010

2 3 4

Replies: 63

Views: 20K

Apr 17, 2011

desertsquirrel

NEW GROW LIGHT Technology!! Induction Lighting & Sulfur Plasma

Elite Nugs
Aug 9, 2011

2 3

Replies: 56

Views: 20K

Jun 5, 2012

Dees Nuts

Rockwool cubes to coco???

jonnynu
Nov 15, 2010

Replies: 8

Views: 20K

Sep 17, 2019

Dirtbag

TRUE AEROPONICS - why arent more people using this method?

mrflamboynt
Oct 8, 2011

Replies: 35

Views: 20K

Dec 24, 2021

Observationist

Heavy yellowing, from 2-4 weeks in flower. Crop threatened, any advice welcome!

Boylobster
Nov 10, 2012

2 3

Replies: 50

Views: 20K

Oct 24, 2020

Blots27

Rockwol And Amazing Roots.

desertsquirrel
Jun 28, 2011

2 3 4

Replies: 67

Views: 20K

Apr 25, 2016

Chance Last

Built my own light rotator- wanna see?

ttystikk
Mar 24, 2011

5 6 7

Replies: 122

Views: 20K

Dec 6, 2014

jumpincactus

Copper Fungicide Safe?

TarBall
Jul 21, 2017

Replies: 10

Views: 19K

Jul 22, 2017

TarBall

Bubble Cloning: Techniques , Tips & Tricks

Beachwalker
Jun 2, 2019

Replies: 27

Views: 19K

Jul 26, 2019

Beachwalker

Germinating old seeds with Gibberellic Acid

logic
May 12, 2009

Replies: 8

Views: 19K

Dec 19, 2018

elcolombiano

Week 4 Flowering, Fan Leaves Drooping

meyer lansky
Dec 30, 2016

2 3 4

Replies: 61

Views: 19K

Oct 14, 2018

Ryguy45

A few questions for only the seasoned growers

THegrowshow
Jul 22, 2011

2 3

Replies: 51

Views: 19K

Aug 10, 2016

Winged Sun

Leaves rolling up of edges with strange bumpy surface

Seaweed
Aug 17, 2010

Replies: 31

Views: 19K

Sep 20, 2011

mikezyg

Sulphur burning questions

SEASCAPE
Jan 7, 2011

Replies: 23

Views: 19K

Jan 15, 2011

SEASCAPE

cloning a flowering female

lidspinner
May 14, 2009

Replies: 22

Views: 19K

Aug 12, 2009

LionVibez

Regalia Biofungicide

Burned Haze
Jul 22, 2019

Replies: 10

Views: 19K

Mar 17, 2021

hotspcace

THE BEAST 666 BLOOM TREATMENT to stop vertical growth

Planet Maker
Dec 7, 2009

Replies: 37

Views: 19K

Sep 12, 2012

Mogrow

Plant Bleeds Red!!

ThePro
Jun 30, 2017

4 5 6

Replies: 111

Views: 19K

Sep 11, 2020

growsince79

You must log in or register to post here.

Latest posts

Tired of trainwrecking other peoples threads? Well then, come party at the captains! Trainwreck this thread with…….trains? Anything goes here……….
- Thatoneguyyouknow_ posted
- A moment ago
Decarb Failed - Can I salvage anything from butter?
- PianoStan posted
- 9 minutes ago
Long time grower - Back at it - Interesting Genetics.
- Thatoneguyyouknow_ posted
- 11 minutes ago
What kind of problem does this plant have? magensium or calcium?
- wolfszeit posted
- 11 minutes ago
S
GG#4 strain we’ve had bout a decade
- Saintpaulshit posted
- 12 minutes ago

View Prizes