Friday, October 31, 2008

The Natural Ponderer on sabbatical…


Yes, it has been a disgracefully long time since the last post!

Part of the reason for that is I have been temporarily promoted for four months, so am busy doing two jobs at once. However, not being one to only share grim news and none happy, I’ll continue on with some ramblings about what has been happening botanically for our Tropical House.

This year has seen a break through for me in growing Victoria from seed – I’ve finally cracked a good growing medium that has kept the precious babies alive to (so far) the sixth floating leaf… an exceptionally pleasing result given I have seen so many fade away after germinating! I’m now facing the pleasurable challenge of finding space for them all. On that note, I’ve also taken the plunge (pardon the pun) and put the healthiest and strongest growing Euryale (Victoria’s fiercely spiny smaller cousin) outside, planted in a great innovation, the Thermoplanter (see image above). So far she has recovered quite well from the initial shock of moving from 31C water to ~18C, and is putting on a second new leaf since the move. For loads of information including a history of the species, cultivation and a wealth of experience head to Kit and Ben Knotts fabulous website Victoria Adventure.


Our Vanilla has been flowering profusely and thanks to a bit of pollinatory handy-work we should have a yield of seven or eight beans. For those who have never had the joy of a freshly picked pod, I can assure you there is absolutely no comparison between them and the shop bought product. The heady aroma from one of these gorgeous beans is so strong that even after two years in an open container one of ours still smells stronger than any I’ve ever had from a shop. For an excellent read about this wonderful plant try Tim Ecotts "In Search of the Luscious Substance". This was the book that taught me how pollinate our Vanilla, so I will be forever grateful to Tim for his work.


Other recent flowerings have included our young Anthurium veitchii, which after a year of settling in since acquiring it, has now begun to hit its’ stride, a couple of sweetly fragranced Crinums (C. jagus and a pleasantly variegated C. asiaticum) along with a few orchids including Vanda tricolor, Gongora quinquenervis and the almost ubiquitous Phalaenopsis sp..


Well, that’s it from me this time around, however to quote a line from one of my favourite films “Keep a weather eye on the horizon”, as next year I’ll not be spread between two roles and will thus have more time for Pondering!

May your greenery thrive and flourish!

Friday, July 25, 2008

The Magnetism of Glasshouses


The weather outside the Tropical Glasshouse has been beautifully wintry this month, both quite cold and wet, which has led me to muse more deeply about glasshouses and the philosophies behind them.

Added to this, I was recently asked “Just what do you think it is about glasshouses that people find so attractive”? Now while I think about this a fair bit (it’s basically my full-time job to try and work that out and deliver it here at the RBG Melbourne) the question did give me pause for thought, and a good chance to reflect a little deeper on just why we as human beings are so drawn to glasshouses and conservatories.

Naturally as we ponder such matters it pays to cast our gaze back to the beginning… or perhaps what we can see as a beginning. There are many great sources for information regarding the history of conservatories and I managed to pick one up last year (when visiting Adelaide Botanic Gardens to see their new Victoria Pavilion) titled “Greenhouses and Conservatories” by Olivier de Vleeschouwer (Flammarion 2001). It seems the origins of the conservatory probably lie in the Orangery, and over time these types of buildings have evolved through many different stages and styles– from the conservatory built on the north side of your home to assist with thermoregulation to some truly magnificent examples, such as Paxton's Crystal Palace or perhaps a more modern equivalent, the Rainforest Biome at the Eden Project.

At the heart of any conservatory or glasshouse (and even the humble terrarium) lies the principle of control: put simply, it is the construction of a space where humans maintain the elements of the natural world enclosed within… of course, like life itself, we never actually have any real control, we merely work with what is, and tamper with it in ways that we find pleasing. Why should this evoke such deep feelings in us, so much so that we build enormous structures at great expense to do this tampering? My feeling is that the source of the inspiration and motivation for these immense works is the same source which also calls in us as children to catch insects in jam jars and keep plants in ice cream containers - it touches us very deeply as human beings and is centered on our connection and interaction with the natural world… so let’s get philosophical…

As human beings we are subject to the laws and actions of the natural world – despite our increased disconnection with nature, we are and always will be organic beings living in dynamic organic world. While we may pride ourselves on our technological achievements (and usually justly so) these too are still subject to the fundamental laws of this physical realm, and merely offer us some comfort and ease of living wherever we find ourselves – and I for one am extremely grateful to be sitting in front of a heater while it’s 5C outside! Naturally our architecture reflects this desire to be comfortable and provides us with shelter from the elements, although this sheltering can exacerbate our disconnection to the earth and its cycles - so just how does all this relate to conservatories?

Well, it seems to me that the principles of normal human architecture are reversed in glasshouses – instead of us sheltering inside a building, protected from the natural world, the glasshouse flips that natural order on its head and puts the natural world INSIDE a human building… thus, humans become responsible for maintaining the climate of the now enclosed ‘natural world’ – and now we begin to touch on the source of those deep feelings. When we become responsible for something, we begin to feel in control, which to some degree we are: without our care the plants in the glasshouse would die; we cannot, however, dictate when they will flower or how fast they will grow (although we can influence these somewhat), so that control is very limited.

This, I think, is what is fundamental to the pull glasshouses have on us – it gives us a sense of playing god for the living beings in our care. The book I referenced early puts it thusly (p7): “The greenhouse grants man the inordinate powers of a deity: it is he who provides earth, water, heat and light.” This feeling is polar to our everyday experience, in which we are subject to the elements, and therein lies our attraction to glasshouses and their kin - the opportunity, albeit fleeting and not really true, of feeling in control of our surrounds and the things that affect us.

Added to this is the opportunity of being transported instantaneously to another world – be it the heart of the steamy Amazonian rainforest or the baking sun of the Namib Desert, glasshouses offer us a journey to another place, distant and foreign to our usual surrounds. Such spaces capture our imagination, and those who can still discover the world through the eyes of a child can feel the magic in visiting a beautiful conservatory: seeing tigers hiding behind the pots, hearing monkeys call among the treetops and maybe, just maybe, finding that which we lose so easily and yet is only a moment away – reconnection with the natural world and our sacred place within it.

Happy Journeying!

Monday, June 9, 2008

A Tale of Two Bromeliads



In honour of the Bromeliad Society International's 18th World Bromeliad Conference (24 – 29 June @ Flecker Botanic Gardens, Cairns), I’ve decided to share the story of two of our Vriesea hieroglyphica, or King Bromeliads.

As part of our Tropical Glasshouse re-opening project in 2007, I placed our two largest V. hieroglyphica (probably between 15 and 20 years old) out the front of the glasshouse, to dress it up somewhat. This was in late May 07, and meant that the temperature difference was quite stark – I suspected they could handle the shock of coming straight from the glasshouse minimum 16C to an average 8C overnight, and it seemed I was right. Both held up very well and continued to grow, albeit very slowly. 4 months passed… until on a very windy day in early spring, one of them blew over, smashing the terracotta outer it was in (thankfully the plant was ok!). I didn’t have a replacement pot, and couldn’t leave just one out there, so brought them both back into the warmth.

I thought nothing of it until I saw that the new growth they were both putting on looked slightly deformed, or at least not like the usual new leaves… So, with my curiosity piqued, I watched and waited (one of the best parts of gardening!) and lo and behold they were both putting on an inflorescence – aka a flower spike! Fantastic, I thought, as I hadn’t seen a V. hieroglyphica flower before, AND it gave me an opportunity trying my hand at both pollination and, hopefully, growing them from seed.

So, over the next 3-4 months I took photos, watched, waited and wondered if someone might pinch them - until they both began to open up and show off their colour. Like many bromeliads, these two started flowering from the bottom of the inflorescence and continued over time until finishing at the tip. Pollination of these guys is a bit tricky, as they open their flowers at night (they’re thought to be pollinated by bats or moths), so you have to get in and do the business early in the morning on any flowers that opened the previous night. This means paying close attention to when individual flowers open, as well as starting each day with a paintbrush or toothpick in hand and a readiness to make like a moth (or bat)! I would love to be able to say I was vigilant and started EVERY day like this, however being the human I am, managed to miss a number of days and flowers... Nevertheless, I was hopeful for a positive result from my diurnal activities, and knew that with time the twins would either bear fruit... or not!

No tale with a Shakespearean flavour however would be complete without some disappointment or loss - I would love to be able to tell you that I was successful in my work, produced bucket loads of seeds, and had a new generation of Vrieseas on the way... Alas, I cannot... it seems my imitation of a moth was not good enough, or perhaps I should have been mimicking a bat!! Still, all is not lost - as is the way of bromeliads, both parents are producing vegetative babies (aka pups) so the lineage will be carried on; whether I have to wait another 15 years to have another go at pollination remains to be seen...!

Happy Growing!

Monday, May 12, 2008

The Titan Arum continued...


There’s been a flurry of Titans flowering this year, with two more coming to my attention since the last post, so I’ve continued with this great plant.

One of them (opened 5 May) was in the basement of Cafe Mavi, Summit, New Jersey. Fortunately, the owner had an exhaust fan running in there as the stench of this giant would surely have ruined his custom! This is his second Titan to flower in the last year and he may have a third coming soon.

The other was also in the US and was due to open around 7 May. Head here for more. It seems that they too will have another Titan flowering very soon, so keep any eye on that link!

Closer to home there has been some discussion on Titans from seed and their propensity to produce multiple shoots as young seedlings. The reasons may vary, but some think it can be damage to the seed or young tuber that may cause it. Either way, one of our 3yr old seedlings has had multiple stems all of its’ young life – not something I expected! When last re-potted (Jan 07, see pic above) it had 12 new shoots coming on and it continued to produce new ones as the old shoots died off. It will be interesting to see how many it continues to produce, as there are now only three strong leaders with a few shorter ones underneath.

The 2kg tuber I wrote about last time still hasn't shown any signs of growth, so I'm holding off repotting until it does. It was from the same batch of seed as the multi-stemmed one above, so I'm keen to see how the multi-stemmed tuber has fared and whether it comes in at a similar weight - I have my doubts on that, but we'll just have to wait and see!

Oh, and another good link to watch regarding Titans is this one, care of Gustavus Adolphus College, Minnesota, USA.

Happy Growing!

Thursday, April 10, 2008

The Titan Arum - Amorphophallus titanum


There’s been a lot of talk and activity around lately about this magnificent species so I thought it timely to kick things off on The Natural Ponderer with it!


The Titan Arum is a native of Indonesia, and has the largest unbranched inflorescence (basically a bunch of flowers) in the world, and is often mistakenly known as the largest flower in the world (that title belongs to Rafflesia sp. Read more here). We have some Titans here at the RBGM, and the pic to the left is of two them - more on those two later on.


Also known as Corpse Flower or Bunga Bangkai, Amorphophallus titanum has staggeringly large leaves with the adult foliage reaching up to three or four metres in height and two metres across. Each plant usually has only one leaf at a time, and it is in fact the petiole that forms the ‘trunk’. Usually pollinated by flies or beetles, the flowers of this giant aroid also give off a powerful fragrance upon opening – a smell much like a rotting corpse. When such an event occurs in cultivation it usually brings a big crowd, so typing ‘titan arum’ into a search engine will yield a plethora of pictures and further information.


We have another Amorphophallus (A. hewittii) at the RBGM that will have foliage as large as A. titanum, but it can't match the reproductive power of the Titan Arum. Our four Titan tubers are probably between three to five years off flowering, but they could take as many as ten or more to get up to size.


There is an archive of worldwide Titan flowerings here , and you can find a great diagram of the Titan life cycle here. There have also been some flowering already this year, and two I know of are one at the RBG Syney and one in the US. Please contact me if you know of any others!


Right-o, I’d better go check those Titans and keep them happy!!

Jeremy P

Naturally pondering, and pondering all things natural

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Update: 16th April

Two points to update this post:

- I’ve received notification of another Titan flowering, this time in Germany

- One of our tubers has just gone dormant, so I had a chance to weigh it. It is seed grown and nearly three years old to the week – and now weighs 2.52 kilos! I’m sure that’s a bit behind what it could be by now, but I’m pretty happy with the ~250% weight increase. I’m planning to keep it packed in moist sphagnum for a couple of weeks and then pot it up for another growing season. Titans often don’t have much of a dormancy period, and can start growing again straight away – so keep an eye out for a new shoot or roots when the old leaf dies off on your Titans!

Wednesday, April 9, 2008

The Natural Ponderer Explained

The Natural Ponderer is the space for my ramblings inspired by and primarily about the botanical inhabitants of the RBGM Tropical Glasshouse. I spend more time there than almost anywhere else, and as such feel compelled to share some of the interesting facts, gorgeous plants and other tidbits with any who care to peruse these pages.

I doubt that The Natural Ponderer will be worth checking daily, more likely every couple of weeks or so. I will endeavor to include any interesting happenings or other things about the Collection as well as occasionals about other parts of the Gardens, or even indulge in some general philosophising :)

I hope you enjoy The Natural Ponderer and please feel free to contact me with your feedback or thoughts!

Jeremy P
Naturally pondering, and pondering all things natural

NB: All views, claims and expressions are mine, and as such are not associated with the RBG.