nobleheart: I think you should ask an Irishman!

nobleheart:Have you tried Google? Maybe ajtgirl can answer that question she owns a nursery.

nobleheart:
Sorry to answer so late
We sell a plant around St. Patty's Day which is marketed as Irish Shamrocks
It is called Oxalis and it has large clover shaped leaves and tiny little white or bluish flowers
The leaves can be bright green or a deep red
I'll try to find a picture

nobleheart:

http://www.easytogrowbulbs.com/index.asp?PageAction=VIEWCATS&Category=13&gclid=COjG9pC-gosCFQstUAodiGDwEQ

Turns out Shamrocks (Oxalis)  are a bulb
We buy them in from other wholesales and don't grow them ourselves

Hope the link works

☼ajtgirl☼: Thanks for helping out.

☼ajtgirl☼: OXALIS????
If I remember correctly oxalis is a noxious weed in New Zealand...maybe skip could verify that as I havent lived there since '78.

BerniceC: I couldn't believe I was reading that somebody was selling oxalis. It certainly is a noxious weed in NZ I've got 3 types growing in my gardens & lawn. Thankfully I have mainly creeping oxalis which isn't so bad but it certainly creeps.

☼ajtgirl☼: here is something I found.....
Notes: The genus Oxalis includes over 800 species of annual or perennial, stemmed or stemless, herbs and shrubs, often with underground bulbs or tubers. A few are aquatic species. Of the thirty species of Oxalis in Australia, twenty are naturalised and many are existing or potential serious pests in various parts of the country. Twenty two species of Oxalis were listed in Victorian nursery catalogues between 1855 and 1889. Eleven species are described in Gardening Australia's Flora (2003) with acknowledgement that 'some of the world's worst weeds belong in Oxalis,…'

One species of concern in Victoria is Soursob, Oxalis pes-caprae which invades coastal heath vegetation, grassland, woodland and dry forest. It also occurs along roadsides, and in gardens, crops and pastures. It is distinguished by the three heart-shaped leaflets with or without stalks which fold in dull days or at night. Flowers are bright yellow in colour and open in sunlight and close at night. There are masses of underground bulbs which are spread by water, birds, in dumped garden waste and during cultivation.

BerniceC:

I understand how many varieties of Oxalis could become a pestic plant in certain locales.  It could not survive the winters such as we have in the northern USA.  It is typically sold in the USA as an ornamental houseplant, especially around St. Patty's Day.  I can imagine though that a field of them could be quit lovely to see, however difficult they are too kill off.  Much like bamboo.
In Maine there are certain varieties of lithrum which are considered weeds, but purchased here in NY by avid gardeners for their beauty and hardiness.  In Hawaii the verbena and impatiens that are naturalized there are pulled out as weeds.