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New Monstera leaf growing with brown spots!

8 years ago

I am new to house plants and just bought a Monstera about a week ago. I have only watered it once since I repotted it because the soil seemed a bit damp and I decided to take the ‘less is more’ approach. My apartment gets lots of sunlight and I have it sitting a few meters from a big window.

My plant is growing one new leaf and it already has brown spots on it! I’ve notice a couple of the small leaves at the roots are getting some brown spots as well. I have clearly done something wrong :(

Please help!

Comments (18)

  • 8 years ago

    Does the pot have a drain hole? The soil looks very heavy and may lead to issues if left as is.

    Mandy thanked Dave
  • 8 years ago

    Do you mean the soil looks too wet? There’s no drain hole. I’ll definitely repot asap.

  • 8 years ago

    The type of soil used will likely retain water for too long leading to rot issues.

    What type of soil is it? If it’s an indoor potting soil and not garden soil, mix it 50/50 with perlite.

    Definitelt get it into a pot with holes or drill some in that one.

  • 8 years ago

    Thanks Dave. Yesterday I repotted it into a terra-cotta pot that has a hole in the bottom, but I used my same potting soil because it was all I was able to find at the moment. I didn’t water it after potting and today I woke up and the bottom half of the pot looks wet. Could this be because the soil was too wet in the original pot I had it in?

  • 8 years ago
    last modified: 8 years ago

    You should have bought some perlite and mixed it 50/50 with the soil.

    That mix you have is extremely water retentive.

    and yes, the pot looks wet because it is.

  • 8 years ago

    I would repot it into a soil mixture with more perlite as recommended and maybe even add some orchid mix (mostly chunks of bark) to it. That being said the brown spots are probably damage that occurred to the leaf before it unfolded, possibly at the store or during shipping to the store......not necessarily anything you did. This plant recently went through a lot of moving around, future leaves should be fine.

  • 8 years ago

    In high humidity environment where it natively live, monstera evaporate low amount of water, which is equal with it's root ability to absorb water from soil. If you live in dry environment, that monstera leaves evaporate water more than the root ability to absorb water from soil, which lead to browning/unhealthy leaves. Porous soil will prevent root rot, but to make the leaves healthy, leaves evaporation should be reduced. Place it at humid spot, or mist it regularly, leaves only, not the soil, to maintain humidity around the plant.

  • 8 years ago
    last modified: 8 years ago

    Misting can lead to fungus and other unwanted issues. It also doesn’t raise the RH for a long period.

    Also, “many, probably more than half of all plants, exposure to rain causes rapid suppression of photosynthesis by inducing stomatal closure and causing temporary decrease or cessation of the photosynthetic mechanism. Examining plants exposed to several minutes of misty rain often reveals complete stomatal closure within 2 minutes, with a 30-40% decreases in photosynthetic ability within 1 hour. In addition, it often takes many hours to several days for plants to return to a "pre-rain" ability to carry on the efficient business of photosynthesis.”

    Misting really only makes the grower happy feeling like they’re doing something beneficial for their plant.

  • 8 years ago

    Fungus spore will only active if leaves being wet for about 6 hours, if they're exist. Misting is a common way to reduce leaves evaporation and maintain environment humidity. You can watch youtube how thousands plants propagated in very large greenhouse and misted every 15 or 30 minutes till their root developed and able to absorb water in rate equal with leaves evaporation. The method is being used in industrial level.

    I don't know where the scientific info about that misty rain coming from. Look at plants near waterfall. Plant that grow 10 meters or 100 meters from waterfall get different level of misty rain and there are no sign of grow pattern differences.

  • 8 years ago

    I appreciate all of your input, honestly. But I think this issue is house plants indoors cannot be treated how you treat houseplants in your tropical environment.

    You simply can’t apply the same things.

    thays why certain plants growing around waterfalls can be misted all day and night and the same shouldn’t be the case for a plant inside your house.

  • 8 years ago

    We don't have houseplants, honestly. Houseplant is term in 4 season climate countries on growing certain type of tropical plants that tolerate low light and can't survive in freezing temperature. So it's basically is an environment adjustment. Transparent roof/greenhouse, misting, heating, grow light etc.. are all kind of environmental adjustment to make plants survive outside their native habitat. So if you're seeing from plants perspective, there's no indoor or outdoor, what they see and want is living condition as close as possible to their native habitat.

  • 7 years ago

    Apologies for this late message. Unfortunately all these comments seem to be misguided. During the formation of new leaves, the monster stem with the very delicate budding leaf might rub against the moss pole or be knocked etc and cause a tiny bruise. That bruise will then expand into a spot when the new leaf grows. It's quite common and nothing to worry about.

  • 6 years ago

    @Dave Hi. I just want to clarify what do you mean with 50/50 ?? 50% indoor plant mix and 50% perlite ?

    Please i want to know, my new growth has brown spots too ☹️

  • 6 years ago

    Hi @Abigail Castro, Dave is saying that when you repot the plant, the soil you use should be a mixture of 50% potting mix (like miracle grow for example) and 50% perlite, which is a substance that helps with drainage. By mixing the perlite in, it helps drain excess water from the soil while you’re watering it so that it doesn’t stay wet too long and cause root rot or a fungus, which could attract fungus gnats. You can find perlite at most nurseries or home improvement stores like lowe’s or home depot. I hope that helps!

  • 5 years ago

    I just bought a monstera from a nursery and it looks extremely healthy and has tons of new growth but the soil is very wet. it looks very dense and water retentive. I’m not sure if repotting needs to be done given the plant looks very healthy.😓

  • 5 years ago
    last modified: 5 years ago

    I should mention 1 of the new leafs that hasn’t unfolded does have a few brown spots.

  • 5 years ago

    Thank you so much for the response! I appreciate the tips and information as I’m new to monstera’s. I’ll keep an eye on her for now and act accordingly. thanks again!!

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