How to trim cryptocoryne?
I have a 30G asian biotope tank with 3 different kinds of cryptocoryne (wenditti green, wenditti brown and green gecko) but some of them get too big, so I wanna trim them down a bit
But I have absolutely no idea how to do that! I have other plants where I can just cut off a few cm from the top and they will grow again, but you cant do that with cryptocoryne I guess
So do you just cut them off by the stem? But only with the ones that are too big
Or how do I have to do it?
- Dan MLv 77 years agoFavorite Answer
If you want to change the growth habit of a crypt, you have to change the light bulb.
A brighter light that peaks in the blue and red photosynthetic wavelengths ( a plant light) will cause the new crypt leaves to grow lower and flatter against the substrate (gravel or sand.)
You may have to add a new fixture or get a bigger fixture to replace the old light fixture.
The new crypt leaves will be more crinkled and more deeply colored, as well as laying flat. Trim off the older taller leaves a few at a time.
To speed things up you can grow some of your crypts hydroponically in the bottom of a plastic storage container with a sponge filter to create a humid terrarium effect.
If you want a low grasslike cover, you could replace some of your crypts with Cryptocoryne parva.
This one grows very slowly, so it will basically stay at what size you plant it for a very long time.
Trimming a large crypt plant is a matter of dividing it. There will be a number of plants of different sizes, all connected by a maze of roots. I cut off any plastic pot. If it's in sand, just scoop it all out. Rinse off the sand or substrate in water from the tank, and then untangle and tease the roots apart from each of the plants in the bunch.
****Between each plant there will be a runner, almost like a root, but connecting plants together instead of fanning out from a plant. Shoots without enough roots should be left attached to their parent plant. Using good scissors or plant scissors cut off old damaged leaves near the base. Cut the connecting shoots about halfway between each plant, except don't cut the ones that go to small plants that don't have a good set of roots yet. Leave those attached to their "mother" plant.****
Replant the smaller plants in the tank since those are the size you want, and put the large ones and the less developed ones in the new hydroponic container. The main cost of this will be the light bulb, or if you go wild, the greenhouse you add to the house to use natural sunlight.
This next one should work well. It puts out purple light that may cause the neighbors to think you are growing some other plant, one which is only allowed in certain states.