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Thread: D. binata: many potential problems!

  1. #1
    I hate bugs. Carnivorous plants get me. jpappy789's Avatar
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    D. binata: many potential problems!

    Long story short (not really) the binata was one of the most vigorous growers before I moved back to school. After that the newest leaves just halted growing and I figured it was just stressed (temps spiked to 90F+ and it was a bumpy ride) so I trimmed them off and assumed it would bounce back with more stable conditions.

    The last week or so my terrarium has had some big dips in temp at night, bigger than I would like. Everything except the binata though is still doing well. Still no new growth at all and I am wondering if the huge temp fluctuations were the issue since nothing else has changed. The "newest" leaves still are producing dew. Odd though since the pure tropicals and sub tropicals are still growing strong.

    I tried getting a decent pic of where the growth point should be. I'm not exactly sure what a dormant binata is supposed to look like...
    Attachment 1553

    Attachment 1554

    Doesn't look too good. There also seems to be some fungal growth on the media as well as some algae. Do I have a combination of problems here? What should be done to get these guys back on track? Or should I just let them do their thing?

    Temps are going to be more stable, hopefully, now that the heat is kicking in at night. I expected more of a die off from the top if it is going dormant but again the leaves are doing well in terms of dew and the worse part is closest to the media. Is a complete media change in order to get rid of the junk growing on top or should I start using a fungicide or let the pot dry out more?

    Sorry for sounding so desperate and being long winded. I'm just flustered as to what the main problem here is and why the binata is the plant taking the brunt of this. It was doing so well right after I received it (and it wasn't exactly in the best condition after shipping) so I want to get it back to normal.
    -Josh
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    Hi Josh,
    It's sort of hard to assess what the problem is for sure but I have had Drosera binata go dormant when exposed to cold, although your conditions don't quite fit what I would expect to trigger the dormancy. This time of year the day length shortens rapidly, and the plants surely feel this even in your terrarium with the additional light. Big changes come this time of year. You can relax a little though I think. Drosera binata are tough Aussie plants, evolved and adapted to survive in the harsh Australian habitats where it grows. This is probably just the plant sensing the less than optimal growing conditions and protecting it's energy investents by going dormant. If there is no new center growth, back off with your watering to maintain a just moist environment. The plant is fully capable of returning from the roots if nothing else provided they don't rot in stagnant conditions. Mine did best outside the terrarium, in fact they did best outdoors, frequently dying back with the onset of cold weather and returning with great vigor when light and warmth entered the equation again. You might want to take some root cuttings now, just in case. This has the added benefit of being able to check the roots for potential problems. D. binata comes very easily from root and leaf cuttings. I feel you should be ok tho. There is no hibernacula during dormancy as with the temperate sundews, the leaves just wither back to their bases, and the center of the plant shows no, or little, growth. If it turns black, it has rotted but the roots will likely regenerate the plant. Hope this helps.
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    That happened to mine when I exposed it to 100F temperatures. I put it in a much more stable environment and it's slowly growing back. The leaves that formed during the heat looked exactly like that. Not sure about the rhizome as it's covered in sphagnum.

    Maybe that's what happens when it doesn't have favorable conditions?

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    I hate bugs. Carnivorous plants get me. jpappy789's Avatar
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    Thanks for the input guys! I thought about the possibility of doing a cutting but I've never done anything like that yet with CPs. At the very least I'm going to check out the roots so long as that doesn't set the plant back any further. I'll get it out of the standing water and maybe that will keep the fungus and algae at bay. I set it in more direct light since I made room in the tank so maybe that will give it the hint that it shouldn't be going dormant LOL. Good to know that they are able to bounce back.

    I was thinking about growing this one outdoors next summer. They are cold tolerant to about 50F or so, correct?
    -Josh
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    CPlantaholic's Avatar
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    Here's a pic of a dormant D. binata, just for the heck of it (should only form when temps drop down to below 40 or so, though):
    Visit The Sundew Grow Guides: http://www.growsundews.com
    New- Drosera video tours & other sundew info, now on YouTube!

    Happy Growing!

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    'ello.

    I feel i can relate somewhat...

    as Tamlin said, D. binata is very tough. Attempts to remove it from my collection without uprooting whole pots often fail miserably, due to incredibly durable root systems.

    As for the new growth: often, as i've noticed, when D. binata goes through as tough time, eg: disease, physical damage, temperature extremes, etc., it will set back, and the newest growth will almost certainly be long and straggly. In every case, it took about three weeks for the plant to return to a normal physical state, at least for me, even under favorable+ conditions.

    Fungus and algae shouldn't be too much of a problem for mature plants, however, fungi in my D. multifida pot nearly destroyed the root system until i was lucky enough to repot it.

    I'd say change the soil and you should be fine, after the plant grows up a little more. Fungi shouldn't be too concerning until its later stage.

    Good luck with it.
    Forget about the mundane and meditate.

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    http://www.terraforums.com/forums/sh...d.php?t=124211

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    Checking the roots is always good protocol. As grow the roots, so grows the plant. If you just plop out the whole pot into your hand you can quickly assess any problems and just slip the whole back into the pot. They won't even bat an eyelash.
    "Grow More, Share More"

  8. #8
    I hate bugs. Carnivorous plants get me. jpappy789's Avatar
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    Do these roots look healthy to you?

    The pot was apparently waaaay too small to contain them. I ripped up all the media trying to get them out.

    Another problem here?
    -Josh
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