Should I prune emersed growth? - The Planted Tank Forum
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post #1 of 6 (permalink) Old 07-07-2016, 11:57 AM Thread Starter
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Should I prune emersed growth?

So in my 72g aquarium, I have 5 Amazon swords all were grown emersed. I have had them for about 3 1/2 weeks. Now that I have transferred them to immersed, I have had about 12 - 15 new leaves grow that are significantly different in shape, more pointed, narrower, and longer. I understand these leaves are because I switched from emersed to immersed.

My question is, should I prune off the emersed leaves? The emersed leaves seem to be growing along with the immersed.

Here is a picture.

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Bump: Here is a picture of the tank shortly after setup a few weeks ago.

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post #2 of 6 (permalink) Old 07-07-2016, 01:14 PM
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I would leave them attached until they show signs of degradation. Some plants adapt better than others but old leaves are still a nutrient resource that plants can use for adaptation.
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post #3 of 6 (permalink) Old 07-07-2016, 03:59 PM
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I noticed the same thing with my (pre-packaged) amazon swords that were apparently grown out of water. In my case, once planted new leaves began to grow, more narrow like yours, while the older outer leaves slowly turned brown, I eventually trimmed these off. In your case, as long as they remain green and healthy, I would leave them be.

For my (again pre-packaged) water wisteria, the leaves were very broadleaf...but the new growth was feathery. Another sign of a plant grown immersed rather than submerged. As the plants grew larger, I cut off the broadleaf base (discarded) and replanted the feathery stems (which now have rooted and are growing very well.

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post #4 of 6 (permalink) Old 07-07-2016, 07:01 PM
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I've read that some trim off all the old leaves before placing the plant in the aquarium,and it causes the new ones ot grow in faster.Closest I did was to trim most of the leaves from one,and it did grow new leaves quickly.

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post #5 of 6 (permalink) Old 07-09-2016, 07:09 AM Thread Starter
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Thank you for the replies. I am noticing that the emersed growth is more prone to algae when switched to immersed.

I'll keep the ones that are healthy attached. Eventually I think I'll clip them off. Maybe trim 1 emersed leaf for every 2 immersed leaves that grow.

I like what you said dukydaf about the plant using the old leaves to learn how to adapt. It makes sense to me.
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post #6 of 6 (permalink) Old 07-09-2016, 07:36 AM
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While they are still attached, the plant can redistribute some of the nutrients held in the old leaves, so, don't get too hasty.
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