First Grow - Looking for coco coir advice.

Discussion in 'Newbie Central' started by Jayboy13, Feb 13, 2018.


    Jayboy13 Member

    Hey guys first time poster.

    I recently acquired some White Widow Fast (feminized) seeds and have decided to attempt my first grow.

    I have very little experience with growing but have done a lot of research across the web.

    I built a space bucket, with 4 x CFL globes (roughly 100W) and 2 x 120mm computer fans for intake and exhaust run off a timer set for 18 hours of light currently.

    Now after reading thread after thread I could not get a proper idea on the ideal growing mediums/nutes/germination methods because everyone seemed to have their own take on it.

    I decided to start the germination process with the wet paper towel idea.
    I am located in OzLand so the products I was able to purchase varied from the US counterparts.

    I bought some "Premium" Coco coir seed raising mix and some perlite potting mix.
    I was unsure if the coco I purchased was correct so ill add a photo of the product.
    I hydrated the coco coir and mixed it 70/30 with the perlite.

    I have average soil temps of 24-25 degrees celcius (75-77 F) a touch higher with the lights going.

    Thats where I am up to so far.

    A couple questions I have are -

    What is the ideal pH for this medium?
    How soon/long should I give the plant/seedling nutes?
    Ideal nutes? I read calMag is a must.
    As far as watering goes is the "2nd knuckle" rule a reliable method of determining when to water?

    Any other tips/pointers would be appreciated.

    Max888888100 and ThatSpudGuy like this.

    ThatSpudGuy Well-Known Member

    Ph is best at 5.8 for coco.

    Calmag is a must because the coco holds on to calcium.

    Alot of people mix the coco with the perlite for extra drainage but its upto you.

    When your soaking the bricks make sure to ph the water your soaking them in.

    You can use the knuckle technique. Coco is very hard to over water in.

    Dont let it dry out like soil as it can be bad for your plants.

    Youll love coco once you get the hang of it.

    Goodluck :smile:
    Max888888100 likes this.

    Max888888100 Member

    Add 5-10% perlite from my experience.

    Dont be adding any nutrients yet, as you will murder the little gaphers. Just plain ph’d 5.8-6.2 water with a touch of cal mag. Unless you water from the tap and ph it, the tap water should have a tiny trace of calmag.

    Ive learnt to water coco slowly and let it soak up the water, too fast pf watering and it seems to zip passed to the bottom and drain out.

    Good luck

    Ps, im running Canna coco nutrient line, expensive but awesome stuff. If your able to feel the weight of the plant, try to pick it up to feel dry vs saturated. Dont overwater!!!

    upnsmoke13 Well-Known Member

    After you have a tap root, plant your seedlings into Solo cups(plastic party cups). Prepare your cup by cutting slits along the bottom edges, I use two on opposite sides. Fill with coco/perlite & water. Add your cal-mag to the water then ph it, I bubble mine. Start your popped seeds in this, one per cup. It's a lot easier to control the moisture while the roots are getting started. Good luck!

    P.s. I'm running Canna A&B plus cal-mag, in Royal Gold Tupur, a coco mix.
    ThatSpudGuy and Max888888100 like this.
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    i've found that it's best to ph coco to 6.1, or i start to get mag issues.
    i like to let it dry out pretty good between waterings, but not quite as good as i would soil.
    read the label on the block of stuff you bought. if it says it's pre-charged, you can lay off the cal-mag a little. it'll still take some, but not as much. if it isn't charged, i'd add it at 1/4 strength every time you feed.
    max is right, don't feed young plants until the cotyledon leaves (the first two one lobed leaves) start to get yellow. they feed the plant for the first few days to a week. the stuff you bought has time released nutes in it, so you probably won't have to feed for the first month or so, anyway.
    Cx2H and Max888888100 like this.

    Cx2H Well-Known Member

    Roger A. Shrubber likes this.

    MickFoster Well-Known Member

    - Ideal pH for coco is 6.0 going in and coming out.
    - I pre-charge my coco with 1/4 strength bloom nutes and I start feeding 1/4 strength bloom nutes from the beginning of sprout.
    - There are plenty of good nutes, just make sure you get coco specific nutes because they contain more calcium and magnesium.
    - I use tap water in my nute solution which contains enough calcium and magnesium without the need of cal-mag. If you use r/o water - cal-mag is a must.
    - Never let coco dry out. If you're using a 70/30 coco/perlite mix you can feed daily - I feed daily from sprout and twice a day when in flower. Never use plain water and always feed to 20% runoff - it replenishes the nutes, pulls in fresh oxygen to the root zone, and prevents salt build up.
    - Good luck, and remember that coco is drain to waste hydroponics, not soil.

    These plants are 3 weeks old from sprout and fed daily.
    21 days old.JPG
    projectinfo and Observe & Report like this.

    Jayboy13 Member

    Hey guys update -

    Seed finally looks ready and coco/perlite is sitting at 6.0 pH.

    About to plant, just want any input you guys may have to offer?

    Also as mentioned above by Roger am I clear to not feed for the first month?

    Ive started with 18 hours of light as soon as I’ve planted it is this necessary?

    6F54C4A5-26AF-4F4B-B595-5F3D100EB57B.jpeg B97C22D1-D1A2-48DD-9891-91C7CDED6222.jpeg
    Last edited: Feb 14, 2018
    Lucky Luke

    Lucky Luke Well-Known Member

    Looks like my Bunnings PH tester...Aussie?
    coreywebster likes this.

    Jayboy13 Member

    Yeah mate haha, I imagine it is poor quality but it will get me through for a while until I invest in something higher end.
    Lucky Luke

    Lucky Luke Well-Known Member


    MickFoster Well-Known Member

    Good luck with that.
    Cx2H likes this.

    SmokeyMcChokey Well-Known Member

    Question about coco pH. Do you guys check runoff use a soil pH meter or just assume it's taking whatever pH you're putting in since it's inert?
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    it just depends on when to start feeding, look at the little coty leaves, when they start to yellow, it's time to start feeding, but go very light to begin with, the medium you got has time released nutes, you have to give it a little time to use that up, then you can up your feeding
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    i've never checked run off ph. the only time i would ever bother to would be if i had some kind of significant issue. in coco, i ph to 6.1, with swings up to 6.3, and down to 5.8, but always centering on 6.1, and so far, no major issues

    Jayboy13 Member

    Hey guys planted two days ago, still hasn’t broken through the soil.
    The pH looks okay and soil is moist to second knuckle.

    Anything worth worrying about?

    Attached Files:

    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    wouldn't worry for a few more days. may want to very lightly water, maybe even with a spray bottle, just to keep it moist down to where the seed is.

    AbeFroman Well-Known Member

    It will take more than two days to break through in many cases. .

    You have the wrong PH meter. You need a PH stick to adjust your feeding solution of water and nutrients. Measuring the medium is pointless in coco.
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    is that a ph meter? i thought that was just one of those moisture meters. yeah, very little point of measuring the ph of coco, but you do want to measure the ph of your feed, coco likes it to go in about 6.1
    AbeFroman likes this.

    Jayboy13 Member

    Hey guys woke up to the little guy not looking so good, any ideas why?

    Attached Files:

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