Problem with plants taking root - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 08-20-2010, 06:16 PM Thread Starter
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Problem with plants taking root

Several of my plants(lysimachia, HM, and cardamine lyrata) will not root in the substrate. When I first bought these stems, I planted them about 1/2-1 inch deep in the substrate. After a few days or a week, the part of the plant that is under the substrate begins to die off, and the bottom half of the plant weakens and turns brown or yellow. The tops of the plants grow very well and are fine when left to float above the substrate. These plants also grow plenty of roots at the leaf nodes. As soon as they are planted, however, it is only a matter of time before the bottom decays and the plant floats away. None of these plants will grow roots into the substrate.

I am not sure why I am having such a difficult time getting these specific plants to grow. None of the other species in the tank seem to have any issues with taking root. I've tried switching substrates, increasing the light, moving the plants, planting them in different ways... nothing seems to be working and it is getting frustrating. Does anyone have any ideas as to what the problem might be? Any help would be much appreciated!

Some tank info...
29 gallons
Turbo CO2 Biosystem by Red Sea
96W coralife fluorescent light
Penn Plax Cascade Canister filter
Substrate is Eco-Complete
No fertilizers

Flora
ludwigia repens
rotala indicus
Hygrophila difformis
Hemianthus micranthemoides
Lysimachia nummularia
anubias nana
ricca
dwarf baby tears
and previously,
Cardamine lyrata

This is my tank...


the tops of the lysimachia look happy, right? the HM tops(not pictured) are similarly healthy.


the bottoms of the HM. it's not as easy to tell in the photo, but they are definitely brown and rotting.
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post #2 of 6 (permalink) Old 08-20-2010, 07:22 PM
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Plants need ferts to grow. With that much light, natural fertilizer(fish poop) will not be enough to sustain healthy growth. Pick yourself up some ferts, whether it be dry or some premaid. Also, head to the fertilizer forum and read up on e.i. and the dosing sticky at the top of the page.
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post #3 of 6 (permalink) Old 08-21-2010, 12:31 AM
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Other than the largish gravel - what substrate is there in the tank?

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post #4 of 6 (permalink) Old 08-21-2010, 12:48 AM
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^
Quote:
Originally Posted by equinoctale View Post
Substrate is Eco-Complete
that's too much light for no ferts and diy co2.

What would Honey Badger do?
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post #5 of 6 (permalink) Old 08-21-2010, 02:35 AM
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Quote:
Originally Posted by oldpunk78 View Post
^

that's too much light for no ferts and diy co2.
I agree.

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post #6 of 6 (permalink) Old 08-26-2010, 11:29 PM Thread Starter
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Thanks for your input, everyone! I'll definitely try fertilizers- I'm reading up on them now. I'm also thinking about getting some flourish excel in the near future to replace the CO2 thing thatI have.
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