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Thread: Brown (dying) curling leaves in flower stage - Please help

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    Default Brown (dying) curling leaves in flower stage - Please help

    Hi All,

    I hop you can assist? For the past few days, I noticed one out of the six I have in flowering stage has developed rusty coloured leaves and now they are drying and curling-up. This is my first grow and therefore I am a little worried, especially as the buds have appeared.

    I had a similar problem in vegging stage but it seemed to cure itself after I had changed the nutes. I am due to change tomorrow but am worried it may come back and I need to understand if it is a deficiency of some kind. I originally thought it might be a phosphorous problem but them it could be magnesium. I am pretty sure it is not the lights.

    Feeding is a bit of a minefield. It was suggested that as I use a RUSH R-DWC system, I should be careful with the nutes. I have therefore kept them to 1/3rd strength for the Canna Aqua Flores but am a little unsure about the other additives such as Cannazym, Rhizotonic and Canna Boost. Should I add these at a reduced strength?

    I have to say, both EC and ph have always been stable, most recently 1.1 and 5.7. I am going to up the EC a little as I am nearly half-way through flowering and will also add PK12/13 into my next feed.

    I will add some pics.

    Thank you in anticipation of your help.

    TECHY BITS
    Soil or hydro or coco: RUSH R-DWC system - 6 pot

    Strain: White widow

    Photo or Auto: Photo

    plant age:

    pot size: 40ltr

    has it been repotted? and when?: No

    soil type: Hydro

    nutes or additives used and how often for soil: All Canna branded products with the addition of Silver Bullet

    Air temps (max min): 25C

    Res temps (max min): 20C

    humidity: 60%

    lighting type and wattage (hps, led, cfl): CDM (4 x 315watt)

    Light schedule: 12/12

    ph level: stable at 5.7

    EC (hydro and coco only) 1.1

    Background EC. 0.4

    feed schedule and nutes (for hydro and coco): As per Canna grow guide although on advice, I use about 1/3rd ratios. Part of my confusion is that using Canna Aqua Flores at 1/3rd strength, should I also be using Rhizotonic, Cannazym and Canna Boost at the same strength or at the prescribed ratio?

  2. The Following 3 Users Say Thank You to HowellingBloke For This Useful Post:

    AND (08-11-18), CityDweller (07-11-18), GEORGE (11-11-18)

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