Episode 107: Oxalis triangularis aka false shamrock
Oxalis triangularis comes in a purple and a green form. Photograph: Maja Dumat on Flickr.
Transcript
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The leaves of Oxalis triangularis are edible and delicious - a bit like sorrel but sweeter and even more lemony! Photograph: Jane Perrone.
I return from holiday to find a dozen bottles of milk turning into cheese on my doorstop, but the good news is that my houseplants are mostly thriving! I check them out, then discuss the wonderfully tolerant (and tasty!) houseplant that is the falseleaf shamrock aka Oxalis triangularis. Here are a few Oxalis facts to consider as you listen…
The purpleleaf false shamrock has beautiful butterfly-like leaves. Photograph: Jane Perrone
The species Oxalis triangularis has plain green leaves but the purple form, Oxalis triangularis subsp. papilionacea, is far more popular.
This is a hardy plant so will do well outside in the summer or even all year down to about -5C. It may lose its foliage in less than ideal conditions but should regrow from the rhizomes that act as underground storage organs. You can grow it indoors at normal room temperature, but it will also do well in an unheated room or porch.
It looks lots of light but will become faded in too much direct sun.
It isn’t fussy about soil but some houseplant potting mix with a handful of perlite will be fine.
Leaves are not longlasting and when they fade they can be snipped away. Leaves are edible but contain oxalic acid so take care not to eat in large quanitities. More info on its edibility here at PFAF.
More on the wood sorrel clan here.
The pink flowers aren’t they exciting so if you want the best foliage, remove the flower stems as they develop.
This plant can be propagated from seeds, leaf petiole cuttings or rhizomes.
The leaves of false shamrock exhibit nyctinasty, opening and closing to maximise their exposure to light.
If you’d like to buy an Oxalis triangularis, the cheapest way is to buy rhizomes which are often available very cheaply. They are often sold in garden centres and by mail order plant/bulb firms.
QUESTION OF THE WEEK
Can anything be done for a birds nest fern with a rotting centre? When it comes to watering, for almost every plant, it’s wise to keep moisture away from the crown (aka growing point) of the plant, especially on any ferns, which resent water sitting around, but do benefit from moist soil. I suggest Jason removes any leaves that are rotted at the base, and checks the crown and rootball carefully for signs of rot. It is worth remembering that some ferns do revive even if the whole of the top growth is killed off, so I suggest Jason waters from below from now on, and gives this fern a chance to revive.
Want to ask me a question? Email ontheledgepodcast@gmail.com.
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CREDITS
This week's show featured the tracks Roll Jordan Roll by the Joy Drops, Brand New World by Kai Engel, An Instrument the Boy Called Happy Day Gorkana by Samuel Corwin, Quasi Motion by Kevin Macleod and Water in the Creek by Josh Woodward. All tracks licensed under Creative Commons.
Logo design by Jacqueline Colley.