Hello fellow gardeners,

my White Widows are sick and I fear they won’t make it. They seem to have a severe infection from bacteria, but I also cannot exclude a fungus infection. I may have overwatered them, especially when I thought I had given them too much fertilizer, so I rinsed the soil.

It all started with brown stains like shown above. Then the leaves got burned from the sides (see next picture). Also, the plants started smelling less than before and they grew very slowly.

It got worse before I decided to cut off all affected leaves. However, the disease came back quickly.

To the day, I find stained leaves every day. The upper leaves also started loosing their healthy green color again, turning yellowish. The tips of the leaves are reddish-brown. There also are holes.

The only good news is: the red leav-veins turned green again after the last watering with fertilizer. However, the plants seem to have almost ceased drinking water by now.

Is there anything I can do to save my ladies, or do I have hold a funeral and start all over again?

  • Gartentherapie@lemmy.worldOP
    2·
    20 days ago

    The first inch is bonedry, but it’s damp below that. Soil moisture is about 40-50%.

    Apparently, my plants have all kinds of deviciencies. I should have used more fertilizer and better soil. This is almost pure coconut.

    • AWistfulNihilist@lemmy.world
      3·
      19 days ago

      Pure coco is a really hard medium for first time growers, you are feeding hydro style for all intents and purposes. You need to measure the water run-off of the plant, the water coming out after you water. You are also aiming to rinse the last feeding out of the coco with the new feeding to prevent salt build up.

      You are locking out the plants somehow (no nutrient uptake, limited water uptake, plant is running off the energy stored in the fan leaves), it will be almost impossible to figure out what is specifically wrong at this point because everything is wrong in lockout.

      https://www.cocoforcannabis.com/watering_coco/

      Check this guide, and if you keep going, this method works very well.

      • Gartentherapie@lemmy.worldOP
        2·
        19 days ago

        I guess I watered too little. I did it in 3 steps:

          1. spray dampen the top soil with water
          1. pour one half of the water with fertilizer
          1. pour the other half.

        That way, there was almost no run-off.

        I use BioBizz BioGrow (an organic fertilizer, but also feasible for hydros), but it turned out: in too little quantities, too.

    • AnarchistArtificer@slrpnk.netEnglish
      2·
      19 days ago

      “This is almost pure coconut.”

      That makes me think drainage/aeration is a problem. (Disclaimer: I have never grown cannabis; my input here comes from many houseplants). I tend to use perlite to improve drainage - I think I use 1:1 ratio of cococoir and perlite as a baseline, but I’m not 100% sure on that

      • Gartentherapie@lemmy.worldOP
        2·
        19 days ago

        I guess I watered too little. I did it in 3 steps:

          1. spray dampen the top soil with water
          1. pour one half of the water with fertilizer
          1. pour the other half.

        That way, there was almost no run-off.

        I use BioBizz BioGrow (an organic fertilizer, but also feasible for hydros), but it turned out: in too little quantities, too.