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Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 17:55
by hydrophyte
I have tried many different kinds of plants in ripariums. Among these have emerged some very useful selections. I have also encountered a few that were unsuitable for riparium culture, either because they did not adapt to culture in water under artificial lighting, or because their growth habits and shapes were unsuitable for riparium layouts--several were just too large to keep in an aquarium display.

One group of plants that has emerged (that was a pun :razz: ) as especially useful are some of the small herbaceous species of Genus Pilea. This group is in Family Urticaceae, the nettle family, and is distributed mainly in tropical areas. There are a few Pilea species that are used as houseplants or terrarium specimens, so they can be found without too much difficulty.

In ripairums I have found that the most useful way to employ Pilea plants is by planting them on trellis rafts and positioning them in the layout midground. They are useful for this because they are relatively short-statured, and many of them have attractive leaf colorations or patterns, which contrast nicely against the dark or light greens of many of the good riparium background plants. These plants also have the important advantage of having modest nutrient demands, so they can grow with their roots suspended right in the water and get along well with the nutrients provided by fish waste and modest water column fertilization.

Here is a shot of my Synodontis lucpinnis catfish display--I have a couple of other fish species in there too--that includes a few very nice little Pilea plants and other light emersed stem plants

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...and here is a close up that shows the two different Pilea in there.

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Each of these is growing on a Nano Trellis Raft, a foam piece that can hold the stems erect and with the bases in the water. The picture below shows the larger of these, which I am identifying with the provisional name, Pilea Florida ditch #1--you can probably make a good guess as to haow I acquired this plant.

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Here is the smaller plant floating right in front of that one in the tank close-up above, Pilea Florida ditch #2.

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Actually, I am not 100% certain that this little plant is a Pilea, but it was growing in the right kind of spot where I found it and it looks like one to me.

This last picture shows better how the stems grow in the Nano Trellis Raft. The plant here is also a Pilea. I am not sure if it is a species or cultivar, but I have seen it identified with the moniker 'Silver Tree'. It has attractive silver-patterned, purple leaves and is the fastest growing Pilea that I have tried.

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'Silver Tree' grows so fast that it is necessary to crop the tops of the stems and replant in the trellis raft when it becomes too leggy. The new cuttings root readily when planted in this way.

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 18:03
by Richard B
The images aren't showing ?

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 18:46
by hydrophyte
Really? I can see them alright. Maybe just wait a few minutes and hit your browser refresh button again. Please let me know if you still have trouble viewing them. I hope that there isn't anything wrong with my image host(?).

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 19:02
by Richard B
Must be something with my laptop - i edited my earlier post to say i could see the pics after a restart but the edit didn't show! :(

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 19:04
by hydrophyte
Maybe it's just a slow connection. Sometimes pages from Europe serve very slowly for me.

Are those pictures useful? I was up all night photo-editing.

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 19:10
by Mike_Noren
My first reply seems to have disappeared?

The pictures load just fine here (Stockholm). My guesses would be a Pilea pumila and Plectranthus australis.

EDIT: And the pictures are very good. The Trellis-raft thing was new to me, very interesting solution.

Re: Pilea sp. for planted ripariums

Posted: 07 Jan 2010, 22:21
by hydrophyte
Wow thanks so much for those species determinations Mike. I must write those down before I forget.

The familiar and pretty-easy-to-find "aluminum plant" (Pilea cardierei) is another good choice for this kind of planting. Here is a group of stems freshly-planted on a nano trellis raft.

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The raft just snaps into place next to the other features in the tank. I did find it necessary to enlarge the notches in the nano trellis raft--I used a razor to cut the foam--so that those fatter stems would fit. It will take about a week for that P. cardierei to start to develop new roots there around the leaf axils that are underwater.