Lovable Lithops

My instant lithops collection purchased from Ebay

  
  Lithops are a type of Mesembryanthemum (try saying that five times fast) found in Namibia and South Africa. Mesembryanthemums are a family of succulents with an interesting characteristic. They look like rocks.

  Lithops are characterized by a two-part plant body. With a yearly growth cycle they reproduce themselves, a new plant emerging from between the two plant halves (which aren't exactly halves, one is slightly larger). Sometimes a lithops will produce two new plant bodies, like the plant in the top right corner of the first photo. A lithops can expand like this over many years, creating a plant body of many lithops joined in a cluster.

  Lithops, apparently, are known as difficult to care for. This is far from true. I think lithops must be the easiest houseplant one can find.

A four-headed lithops I found on clearance at Home Depot.

  Lithops are rarely in need of water. In fact for at least half of the year they want nothing to do with it! After growing a new plant body a lithops will absorb the nutrients from the old plant body, eventually leaving a husk that can be pulled off with care. The four-headed lithops in the above photo still has the desiccated leaves attached. It is essential during this time that you DO NOT WATER! Lithops are from extremely arid areas, and only experience rainfall a few months out of the year. Overwatering can easily lead to the death of the plant!

After potting the plants. Old plant bodies are visible on a few.

  In the spring the old plant bodies are husks, and you can water your plant(s). Only water them about every two weeks, and STOP WATERING when summer hits. The plant is resting, and too much water can overwhelm it. Towards the middle/end of August start watering again, and water well, letting the soil dry completely in between waterings. In a month or two a lithops will produce a single yellow or white flower, which emerges from the center just like the new plant body eventually will. Stop watering when the flower begins to wither. After the flower dies a new plant emerges. At the end of winter, in late spring you can start watering again.

I usually don't name plants, but this is Audrey!

  I'm looking forward to my plants blooming this fall, but not all of them will. Lithops won't produce a bloom until they are at least a couple of years old. With that in mind I am pretty confident my "four-headed" lithops will bloom in September. It has to be at least a few years old, as a lithops only doubles (if that) during a single growth season. This also means that my two-headed lithops could be old enough to bloom as well. As far as I can determine, the only way to know a plant is older than a year is if it contains more than one plant body, and plants do not necessarily double every growth cycle.
  

Lithops a few months later. The old leaves have withered away.

  I've watered my lithops only a few times. I watered the four-headed plant when I planted it because one of the plant bodies was slightly wrinkled, indicating a need for water, as well as the fact that the soil it was in was sand-dry. I'm guessing that's why they were on clearance. Home Depot probably only sells lithops and other mesembryanthemums seasonally and has a "no watering" rule.

  When it comes to placing your pot of lithops, make sure it's in a location where it can get four to five hours of direct sun each day. More than that can lead to sunburn, as you can see the lithops on the 

left in the above picture. Without enough sunlight a lithops will grow long and thin, trying to reach whatever light they can. Mine are all in an indoor windowbox facing the north. I don't have good east and west windows, so it was a choice between north and south, and I'm definitely more Yankee than Union.

  Most of my lithops were an eBay lot purchase with which I'm very pleased. Lithops seeds are inexpensive, and apparently grow well. Having no patience for seedlings, I went straight for the adult plants, which one should be able to find for less than $5.00 for an individual plant. If you hurry now (date of post) to Home Depot you might find some on clearance for a couple of dollars. Good luck!