How to grow cannabis in Coco Coir (hydroponic)

[tomster]

On 7/11/2022 at 3:14 PM, BritManToo said:

Calibrating your pH pen. 

I dip mine in a glass of milk and wind the adjuster screw until the display reads 6.6.

https://s.lazada.co.th/s.hxCH7

 

Mine was way out when it arrived from Lazada, reading 6.2 for milk...... No way! 

For accurate PH/EC calibration these are what you need:

 

https://www.lazada.co.th/products/i1978886344-s6332054048.html?urlFlag=true&mp=1

 

https://www.lazada.co.th/products/ec-meter-14-mscm-005-mscm-120ml-i687184202.html

 

A good PH/EC pen for the money is this one:

 

https://www.lazada.co.th/products/i122609286-s127996867.html?urlFlag=true&mp=1

 

I really prefer the screw calibration over the auto calibrate type as you get finer control and they are way more reliable overall.

 

[tomster]

On 6/29/2022 at 6:20 PM, bangkokairportlink said:

 

Anybody tried with 24h aircon ?

 

If you want to grow premium cannabis you will need to grow with 24hr aircon here in Thailand.

 

Temps should ideally be 26 degrees C or under.

 

BUT - temperature is not the biggest issue as aircon is everywhere, growing indoors in Thailand is all about humidity control.

 

If you are in week 4-7 of flower and you let the humidity go above 40% you are absolutely asking for bud rot - it gets every grower here sooner or later.

 

Some aircons seem to be able to deal with the humidity whilst the air is being extracted, others not so much. You will need to set the the growing environment up and test thoroughly first to see if your aircon can handle it, most I think cannot so dehumidifiers will be needed.

 

If you just grow 3-4 plants in an open tent/room then you will not produce dense enough buds for this to be a problem, but if you want to grow the premium weed then you absolutely need to focus on humidity control.

 

These are worth their weight in gold:

https://www.lazada.co.th/products/inkbirdihc-200-10a-i1180092435-s2797328741.html

 

[tomster]

On 6/14/2022 at 2:27 PM, BritManToo said:

You need a light soil, with little in the way of nutrients. All the potting soils and 'din dee' I have found contain high levels of unknown fertiliser that burn your plants roots.

https://www.lazada.co.th/products/i3096982642-s11425823709.html?urlFlag=true&mp=1

 

Expensive but best Lightmix soil I have found here so far.

 

Mix with one 70l bag of it with about 3-4kg worm castings for best results.

 

https://www.lazada.co.th/products/i1897682199-s5961880190.html?urlFlag=true&mp=1

 

Also a good idea to add in some friendly fungi if you haven't added it by then:

 

https://www.lazada.co.th/products/i2809076077-s10238236549.html?urlFlag=true&mp=1

 

Other things you can add are rice husks (very cheap here and a good source of silica which plants love) and Fulvic acid, although I add both Silica and Fulvic in liquid form with the feed to make sure that they get enough throughout the plants life - they make a huge difference.

 

Totally agree with the heavily fertilized soils here (we used to call them hot soil in the UK) - they are OK if you know how to read the plants but yields are always low. Quality can be good but very hard to control the feed to a level where the plants don't get nutrient burn and lockout.

 

 

[stoner]

29 minutes ago, tomster said:

A good PH/EC pen for the money is this one:

 

https://www.lazada.co.th/products/i122609286-s127996867.html?urlFlag=true&mp=1

 

I really prefer the screw calibration over the auto calibrate type as you get finer control and they are way more reliable overall.

i recently bought a blue labs ph pen and ec to replace my old non good ones. lol 

 

if in your budget i highly recommend the blue labs. my ladies are as beautiful as they have ever been with such great accuracy on ph and ec. 

[tomster]

46 minutes ago, stoner said:

i recently bought a blue labs ph pen and ec to replace my old non good ones. lol 

 

if in your budget i highly recommend the blue labs. my ladies are as beautiful as they have ever been with such great accuracy on ph and ec. 

They are excellent but for most people the price is simply not justified - as long as you calibrate the pen I linked to above once a week it does exactly the same job as the Bluelab equipment.

 

 

[stoner]

4 minutes ago, tomster said:

it does exactly the same job as the Bluelab equipment.

does it though ? why such a huge difference in price ? i would think that it is made of much higher quality materials and therefore would give a much better performance overall. 

 

a  factory honda civic does the same job as a lambo ????

 

[BritManToo]

21 minutes ago, tomster said:

They are excellent but for most people the price is simply not justified - as long as you calibrate the pen I linked to above once a week it does exactly the same job as the Bluelab equipment.

120bht, screw adjuster, works perfectly.

https://www.lazada.co.th/products/ph-led-ph-i1659122611-s4622618788.html

 

Currently growing in 50/50 bag soil/Peat moss mix.

Apart from the plants stretching this year (not sure why), everything seems to be growing well.

 

A few seeds from the UK, more seeds from Facebook at 200bht/100.

Too many have germinated, I have about 50 seedlings growing at the moment.

Edited August 15, 2022 by BritManToo

[tomster]

4 minutes ago, BritManToo said:

120bht, screw adjuster, works perfectly.

https://www.lazada.co.th/products/ph-led-ph-i1659122611-s4622618788.html

 

Currently growing in 50/50 bag soil/Peat moss mix.

Apart from the plants stretching this year (not sure why), everything seems to be growing well.

Ah, cool - not seen the budget ones with the screw adjuster before, thanks.

 

The auto calibrate version of that pen is basically worthless, I went through 3 and they all worked for a few days then died.

[tomster]

17 minutes ago, stoner said:

does it though ? why such a huge difference in price ? i would think that it is made of much higher quality materials and therefore would give a much better performance overall. 

 

a  factory honda civic does the same job as a lambo ????

 

If the budget pen calibrates properly at 2 points (in our case 4 & 7) then there can't be any difference. If you put them in the same solution they would read the same, so not sure how Bluelab has better performance at measuring anything - they just last longer.

 

When they do break, and yeah Bluelab stuff does break, you can get the repaired or replaced for free - the lifespan and warranty are the main difference (and possibly not need to calibrate so often).

 

Don't get me wrong I love Bluelab equipment, but most people just don't need it.

[BritManToo]

5 minutes ago, tomster said:

Ah, cool - not seen the budget ones with the screw adjuster before, thanks.

 

The auto calibrate version of that pen is basically worthless, I went through 3 and they all worked for a few days then died.

Comes with a case, screwdriver and 2 bags of test powder. 

I always set mine in a glass of milk, in the milk and screw until reading Ph6.6.

[jaideedave]

On 7/23/2022 at 10:55 PM, Siam Buds said:

Isn't it too strong on Nitrogen N?

Mine came as powders and it says like 50-100 grams per 20L

 

Confused

 

Will have to cut that by 4 I guess especially at the beginning?

 

Nitrogen toxicity is a problem isn't it?

 

 

I'm using the same Wesco products as Brit man. I use the PPM/EC method for feeding my plants. Search for a (ppm chart for ganja) I start mine out with about 500 ppm then gradually increase it up to about 1000 to 1500 max. Don't waste your time looking for plastic spoons..

[tomster]

2 minutes ago, BritManToo said:

Comes with a case, screwdriver and 2 bags of test powder. 

I always set mine in a glass of milk, in the milk and screw until reading Ph6.6.

Does the milk state it's 6.6 on the bottle?

[BritManToo]

1 hour ago, tomster said:

Does the milk state it's 6.6 on the bottle?

All fresh milk has a ph between 6.5 and 6.7.

[tomster]

11 minutes ago, BritManToo said:

All fresh milk has a ph between 6.5 and 6.7.

Ah right, cool - didn't know that. 

[LoveLayla]

On 8/15/2022 at 10:56 AM, jaideedave said:

I'm using the same Wesco products as Brit man. I use the PPM/EC method for feeding my plants. Search for a (ppm chart for ganja) I start mine out with about 500 ppm then gradually increase it up to about 1000 to 1500 max. Don't waste your time looking for plastic spoons..

yea got ppm pen, tho was doing 1g per L then up to 1.5g they ok

[Mr Meeseeks]

I swear by Bluelab kit now, the pH pen is waterproof and I can leave it dangling In the nute bucket. I got mine on Lazada for about 4,000thb. 

 

I also have the Bluelab truncheon for checking EC which I use daily and the soil pH tester. 

[rice555]

On 8/15/2022 at 10:56 AM, jaideedave said:

I'm using the same Wesco products as Brit man. I use the PPM/EC method for feeding my plants. Search for a (ppm chart for ganja) I start mine out with about 500 ppm then gradually increase it up to about 1000 to 1500 max. Don't waste your time looking for plastic spoons..

WESCO has other formulations of their Crystalline fertilizer.  I've used it in

dripline fertagation. They also sell all you need for Hydro Nute's.

[Livesbkk73]

I found this company today, seems like fair prices?

 

https://www.facebook.com/profile.php?id=100075439888020

 

 

 

 

[iwan55555]

have tried and order quite a few different coco peats...  and many claim to have very low EC...

others say ... nothing is added...

 

but measuring is knowing.... starting with an 1500-2500 EC value is a big NO go.

1.5 - 2.5 mS/cm or 1500 -2500 μS/cm

 

Have not found a cocos or not the bricks who has a nice low EC... 

yeah they most all got the PH correct... 5.5-6.5. 

 

cannadude420   cannabis soil.... EC 2300 μS/cm... 

 

Getting good soil here... or even making your own Coco or Peats mix... with a low EC seems to be pretty hard here.... more is beter... is certainly not what we want for the EC..

 

as for how to test PH/EC i would refer to bluelab/hanna websites... but looks like we have exp. players in here. 

 

any updates on coco or soil with a low EC... please post it here.  

 

coco should be maximum 800 μS/cm... but if its real clean it should actually be 100 μS/cm

and seedling/starting plants 1500 μS/cm

 

anything higher is just too much.... 

[mooseman]

On 9/5/2022 at 6:11 PM, Livesbkk73 said:

I found this company today, seems like fair prices?

 

https://www.facebook.com/profile.php?id=100075439888020

 

thisnis the one i grow in

 

 

 

 

[mooseman]

Grown in same coco as above, 8 days into flower.

 

Running 3.3 ec and ph 5.8

 

runoff 5.5 ec and 6.4 ph right now