Saturday, 2 September 2017

Cryptocoryne cordata var. siamensis "Red Giant"

Cryptocoryne cordata var siamensis 'Red Giant'
I was lucky enough to score a piece of this Crypt from a local shop display tank.  I normally use small 95mm square pots for my crypts but this was a big crypt so it went in a  150mm pot and is in a 600l 6x2x2 tank (sharing with some purple spotted gudgeons).  Its a big crypt -  currently 40cm tall and the biggest leaf blades are 20x7cm excluding the petiole.  A few sellers in Australia recently have been selling a  Crypt cordata named "Red Giant" so I'm assuming this is the same - the undersides of the leaves are very red.  There are a few other similar plants in Australia at the moment: A Crypt cordata distributed by Dennerle, and another Dennerle variety sold as Crypt. x purpurea but clearly both are varieties of Crypt cordata var. siamensis.

  "To make a long story short: almost all Cryptocoryne cordata plants in our aquaria today belong to var. siamensis. If you have it growing successfully in your aquarium there is a more than 90% chance that it is var. siamensis. And even if it is not growing well, there is probably still a more than a 90% chance that it is var. siamensis. If it were one of the other varieties of Cryptocoryne cordata it would most likely be dead by now.  Of course, if you are one of the few people keeping aquaria with a pH of 4 – 5, you may have something else, but even then there is a good chance that you may have var. siamensis."

Jacobsen, N., and Bastmeijer, J.D. 2014. On Cryptocoryne cordata var. siamensis. Aquatic Gardener 27(3): 29–39.

Friday, 1 September 2017

Cryptocoryne ferruginea update

Quite a disappointing  recovery so far but fingers are still crossed for success.  One stem has rotted without shooting.  The other stem threw a couple of leaves then stopped and also rotted (the big leaf), but the other end of the stem has now shot again so fingers crossed.  The media is plain peat moss and sand watered by rainwater (pH 5.5 to 6.0) to provide acidic conditions.  I put some alder cones in the water to push the pH down a bit lower but they don't seem to have much effect.  I've tried oak leaves and beech leaves so far but still only getting pH down to 5.5 to 6 and I think I need to push it a bit lower (more acidic).

Cryptocoryne aura

Discovered in 2014 and described only last year. 
Has beautiful pink and green hues with a very fine transparent "frill" on the leaf margins.  So far it seems to grow well with the water just lapping at the leaves. Pictures of Crypt aura in its natural habitat show it growing in shallow water (Russian Blog Aquaflore.ru).

Thursday, 11 May 2017

Cryptocoryne ferruginea needs a helping hand

Crypt ferruginea stems re-shooting in the ICU

A couple of decomposing Crypt. ferruginea stalks were given to me in the hope that I can pull them back from dead.  Hopefully not too little too late.   I know nothing about C. ferruginea other than what I can find online.

From Ipor et al (2006), it is naturally found in acidic conditions with pH 4.6 to 5.5, likes very soft water and shaded conditions.


 I loosely bedded the stalks into a mix of sand and composted oak leaves and flooded them with pure rainwater (pH 5.5-6.0, EC 10-20 ┬ÁS/cm) to the depth you see here.  There is a bit of soil in the leaf mix that is initially causing the pH to rise, so I've been draining the pot and reflooding with fresh rainwater every couple of days to maintain acidic conditions.  I'm waiting on fresh supplies of peat moss and I may switch them over to a fresh mix with more peat if the pH keeps going up.

Fingers crossed.

Further reading: Ipor, I. B., C. S. Tawan, and M. Basrol. "Growth pattern, biomass allocation and response of Cryptocoryne ferruginea Engler (Araceae) to shading and water depth." Journal of Bioscience 17.2 (2006): 55-78.

Tuesday, 9 May 2017

Cryptocoryne parva submersed vs. emersed

Crypt parva (submersed)

Cryptocoryne parva is a great small crypt from Sri Lanka that is sometimes grown as a carpeting plant in a planted aquarium. Hats off to anyone that achieves this as Crypt parva is a very slow grower so you need patience or to invest in buying lots and planting heavily at the outset. I've seen people closing down a tank sell chunks of "carpet" afterwards for $100+ to be snapped up by the impatient.

The top photo is a slightly manky lunchbox of Crypt parva in one of my tanks. I plant parva around the base of my Aponogetons as it looks good and stops the fish scattering the gravel.  Some people think the Crypt roots help oxygenate the substrate.  Perhaps thats true... but in this case the Aponogeton died leaving me with a nice crop of parva about 1cm tall.  I took a few plants and put them in a pot to grow emersed and they took off.

Crypt parva emersed

If you didnt know better you might think the emersed plants are one of the Cryptocoryne ×willisii group that is well known for the characteristically lanceolate leaves on long petioles, or even a dwarf sagittaria. The substrate mix is nothing special - sand, peat moss, and a handfull of shell grit to buffer the pH and add calcium and a handful of composted oak leaves for nutrition

Last year I lost my emersed Crypt parva in winter - tough love in a cold climate. This year the heaters are in early.

Sunday, 9 April 2017

Cryptocoryne cordata var. siamensis 'evae'

Cryptocoryne cordata var. siamensis 'evae' top view
Cryptocoryne cordata var. siamensis 'evae' underside of leaves

The plant pictured was given to me by a long time plant grower who's had this in his plant room for 30+ years as Cryptocoryne evae and has sold it to many enthusiasts over the years under that name.

Cryptocoryne evae and Cryptocoryne blassii are old names that are now considered synonyms Cryptocoryne cordata var. siamensis. Although they are now considered the same species, there can be subtle differences in the varieties that warrent keeping them separate in cultivation. For this reason the full name of the 'blassii' variety is Cryptocoryne cordata var. siamensis 'blassii' and therefore this 'evae' plant is Cryptocoryne cordata var. siamensis 'evae'.

Confusion in crypt taxonomy is not a new thing and there is more than one online database that still uses the "evae" name.

The source grower thinks the underside of the leaves may be paler red (more green) when compared to blassii, but that could also result from growing conditions (and that red leaf bottom left looks very much like my blassii). I'll grow evae side-by-side with blassii and see if any differences are maintained.

Wednesday, 5 April 2017

Cryptocoryne moehlmannii

Cryptocoryne moehlmannii
Cryptocoryne moehlmannii
Crypt. moehlmannii looks similar to Crypt. noritoi and Crypt. pontederiifolia so really need to make sure they are labelled clearly.  There are subtle differences in colour and the ridges on the leaves and   moehlmannii is a little "pointier" then noritoi.

Cryptocoryne noritoi

Cryptocoryne noritoi 
Cryptocoryne noritoi

Cryptocoryne crispatula var. kubotae

Cryptocoryne crispatula var. kubotae
Coming along nicely emersed and can be split soon.  see earlier post

Tuesday, 4 April 2017

Cryptocoryne wendtii 'flamingo'

Cryptocoryne wendtii 'flamingo'
Cryptocoryne wendtii 'flamingo'
These are young emersed plants kindly sent to me by another grower.    Its interesting that the young leaves got curled edges but the new leaves dont.  the flamingo colour is really only seen on new growth when grown in submersed culture but the pink tendancy is visible emersed. 

Cryptocoryne undulata 'brown'

Cryptocoryne undulata 'brown'
Cryptocoryne undulata 'brown'

Cryptocoryne undulata 'Kasselmann'

Cryptocoryne undulata 'Kasselmann'Cryptocoryne undulata 'Kasselmann'

Saturday, 1 April 2017

Oak leaf mould

Composting oak leaves
"Leaf mould" is popular with European crypt growers so I've started putting oak leaf mould into my mixes.  Leaf mould is just the humus from composting leaves.  A few initial trials on emersed varieties of Crypt. undulata have been really good with improved growth rates and healthier looking leaves over just using peat moss and sand.  The leaf mould starts as raked up oak leaves in a cut down barrel that has no bottom where they compost down.  I keep adding to the top and stiring it occasionally.  When its ready I pass the broken down leaves through a 5mm garden sieve, keeping the smller fraction and returning bigger leaves to the barrel.

Oak leaf mould made from composted oak leaves


I've been using the oak leaf mould to replace some or all of the peat moss in a mix that is about 40% peat/oak, 50% sand and 10% red clay and shell grit.   We don't have many "blackwater" crypts in Australia that grow in pure leaf mould, but if they ever get here I'm ready.

Update: May 2017.  The pH of the mix is approx 7.2 so not acidic at all and not the best for the true blackwater crypts.  I certainly do think its benficial to the mix, but for species that need pH <6.0 this isn't going to do it... at least not in the form it is here.  I've got some in jars with Crypt cordata that have been festering as a slurry with water for a longer period of time and these are more acidic.  It might take a couple of months in water for the organic acids to really do their thing.

Tuesday, 28 March 2017

Cryptocoryne pontederiifolia

Cryptocoryne pontederiifolia

Cryptocoryne ciliata var. latifolia

Cryptocoryne ciliata var. latifolia

Cryptocoryne ciliata var. latifolia

New runners and hopefully a flower forming. Crypt ciliata in the wild is more of a brackish mudflat plant so tends not to be common in aquaria. I have one submersed also but its nowhere near as healthy and vigorous.

End of summer 16/17

Photo update of my emersed crypts before I move them from their suymmer "shed" back to the glasshouse for winter. The boxes are slowly multiplying - my goal is to have a couple of pots of each variety and after that any extras I can propagate will be distributed to other collectors first (off-site backups!) and then to whomever shows an interest. There are 4 tanks of submersed crypts inside too. OTT? maybe.

 

Above: Mostly Cryptocoryne undulata varieties in a new potting mix that is working really well (sand, clay, peat, a handful of shell grit, and composted oak leaves) - notice the dark greens. Growth has been great in these pots and I think composted oak leaves have improved the mix.
Above: Older pots (a little yellowing suggests more ferts needed) mostly C. wendtii to the left, C. cordata to the right, C. albida varieties in the back, C. crispatula var. kubutae is the grassy one in the middle.

 
Above: Mostly C. spiralis in the back (lots of flowers at the moment but not really visible in the pics), C. crispatula varieties in the front. Again notice the yellowing of some of the plants suggesting the nutrients in the pots are exhausted - crypts are heavy feeders and these post have been going for more than a year. I've started putting just a little of my aquarium fert and trace mix into the water.

 
Above: Bits of this and that - C. wendtii varieties in the back, C. crispatula var balanasae poking through... A lovely pink C. pontederiifolia front left and closeup below.


Cryptocoryne cilliata var. latifolia - finally happy after nursing it along for a year or more, two other pots all rotted away. I have one submersed also (not going so great but stable). It looks like I have some runners forming and also maybe... a flower! I love the hairy flowers from these and have not seen one that was grown in Australia before - see pics on the Crypt Pages

Friday, 13 January 2017

Cryptocoryne crispatula var. flaccidifolia vs. Cryptocoryne crispatula var. balansae

Cryptocoryne crispatula var. flaccidifolia and balansae

What I am calling Crypt. crispatula var. flaccidifolia (left) vs Crypt. crispatula var. balansae 'red stem' (right).    Ive grown the flaccidifolia for over 10 years thiking it was a limp variety of balansae. Some people also grow a similar looking palnt and call it C. retrospiralis but based on the description for C. retrospiralis on the Crypts pages I think this is incorrect.  The characters that distinguish it are the limper leaves (more flaccid!) and the undulating margins of the leaves compared to the balansae that usually has a straight margin and bullate blade.

There are a number of varieties of Crypt. crispatula var. balanasae in Australia - this one is the 'red stem' variety where the petioles and central vein can be quite a dark red. There are others with creamy white petioles and veins that I unimaginatively call Crypt. crispatula var. balanasae 'green' to distinguish it.