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Lucky Leaf

2/7/2014

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And extremely easy to find because it  can be grown on... a window sill.  Unlike the four-leaf clover whose dubious or at least mutable existence makes all of us spend hours in the meadow, busily scanning  all growing shamrock to find a reward: a four-leaf  trefoil. You really are lucky if you find one.  However, if you do not feel like  hunting for luck in the field and  would like to have  at home a potful of lucky leaves - without any substantial effort - all you need to do is buy a bag of small bulbs labelled: Oxalis deppei or Iron Cross (its  common name) and simply plant them in a pot. Within two or three weeks the first lucky leaves will appear and start  working wonders. Some of them are even observable as the leaves move. Botanists have coined a somewhat little flattering term for that activity and call it nasty. Well, it is the photonasty.
Not all so- called false shamrock plants can boast four-segment leaves as the Mexican Oxalis deppei.  Some of them do not try to take in anyone and have only three leaflets on a stalk. Still, they are wonderful plants to grow either as home or garden ornamental species. One of them is the Brazilian wood sorrel also called Love Plant  - Oxalis triangularis, which  produces conspicuous  deep purple leaves whose three leaflets show all signs of the photonastic movements. At day time they are quite flat basking in the sun, at twilight they begin to close and resemble sleeping bats. This intriguing behaviour is related to light intensity and does not occur on cloudy days; the leaves are all sleeping bats at that time.

Both Oxalis species apart from having beautiful leaves and extremely charming flowers (Oxalis deppei produces coral pink blossoms and  Oxalis triangularis  has chosen light lavender blue ones) are very easy to grow.  Iron Cross produces little bulbs, Love Plant scaly rhizomes. You can buy them in every good garden centre or online. And the time is now. In March or early April the bulbs and rhizomes should be planted in pots filled with  good  garden compost. They do not have any special requirements as long as the containers they are grown in have a drainage hole at the bottom. The delicate roots do not like to be soaked in water. 
We cover the bulbs (rhizomes) with a 2-3 cm (1 in) layer of moist soil and keep the pots in a warm and well lit place. When the first leaves appear we should not  let the compost become dry nor should we water it excessively. Moderation is the key to success.  Soon the flowers are born and the plants continue their abundant blooming until early fall. After the last May frost we can keep the plants outdoors.

Oxalis flourishes in light but not too strong. At summer time its ornamental leaves require some shading on very hot and sunny days. It is a good idea to feed the fast growing and laboriously flowering plants with a standard fertiliser every two or three weeks. The last application should occur in the first week of August as the underground  bulbs or rhizomes need to prepare for dormancy. The first sings of it are visible when the leaves turn yellow and orange and fewer and fewer flowers appear. Seeing that we should stop watering and put the pots in a cool place just before the first autumn frost. There they are going to wait for the following spring. 

In the  European forests  we can easily find Oxalis acetosella - common wood sorrel, with three-segment leaves and charming  white little flowers appearing in May. Its leaves and flowers  - as well as  the leaves of the heroes of today's post - are edible. Yes they are. But I do not recommend that you eat them as the luck they are supposed to bring can be lost in the process of digestion. Too much of any Oxalis leaves can actually result in indigestion, so do not risk your luck and well-being.

There is yet another species of the same genus, Oxalis stricta, which was brought to Europe from Northern America and this one does not bring any luck, I am sorry.  Just the opposite is true for upon arriving  it started to misbehave on the Old Continent and  has become a nasty weed everywhere, and alas, this time nasty has nothing to do with the photonasty.
Jarek
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    I was destined to be born gardener. In order to become a professional  one I had to enjoy years of studying at various  schools and  universities...  read more

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