• Soap Nut Trees
Soap nut trees are one of nature’s greatest gifts.
Man has used soap nuts since ancient times – primarily in Far East lands. They go by many common names such as soap berries, washing nuts, soap nut shells, wash shells, soapberry nuts, Ritha nut shells, Chinese soapberry and many more. Until recently, they have been obscure and virtually unheard of by most. There are logical explanations for this obscurity – many are sad and tragic, but true. However, what is most important is where we go from here. Integrating the benefits of soap nuts into our daily lives will be one of the greatest accomplishments of our age.
Soap nuts are more appropriately called a soapberry. I will use both terms. There is no difference whatsoever regardless of the term used. To visualize a soapberry, think of a golden colored cherry while still on the tree – they are very similar type fruits in appearance. Being more specific, the soap nut that we use for cleaning purposes is actually the pulp and skin of the dried soapberry. The seed is not used for cleaning. It is for cultivating new trees. Research is being conducted for other uses of the soap nut seed, but no other benefits have yet to be documented. Please note that all soap berries are not alike. This will be discussed in detail.
This pulp and skin contain an extremely important natural substance called saponin. Saponin is a truly natural soap (in effect at least). More precisely, and MOST importantly, it is a 100% natural surfactant. By definition a surfactant is an agent, chemical, drug or substance that reduces the surface tension of liquid. It is this reduction of water surface tension that makes cleaning easier. Soap nuts contain this all-important saponin that makes our everyday cleaning needs not only easier, but much healthier, safer and totally free of synthetic chemicals.
So, a soap nut is the vehicle that releases this highly effective, 100% natural substance that is the best alternative to the synthetic chemicals used in the virtually all commercial detergents and cleaners. Even today’s supposedly “natural”, “organic”, and “green” detergents and cleaners mainly use synthetic chemicals as their primary active ingredients. Saponin is the only all-natural substance known that works as effectively and diversely as synthetic surfactants – and therefore is one of the greatest re-discoveries of our age.
I state “re-discovery” because soap nuts are far from new. There are many ancient and Ayurvedic treatments that soap nuts have been essential in producing. They are still commonplace and the primary cleanser used in many remote regions of the world.
They key here is that Mother Nature has freely provided us a substitute for the man-made chemicals that have been coming out of the factories and labs of many of the largest companies on earth. This simple all-natural substitute has profound health and environmental benefits for all mankind. With only a little thought, it is easy to understand why soap nuts are not well known. What does man crave and Mother Nature cares nothing about? Money.
People across the globe are taking a hard, close second look at all the hazards and problems created by exposure to and release of all the synthetic chemicals in our world. Soap nuts are now in the right place at the right time. Soap nuts will be one of the leaders of the new, green age that lies ahead. Their time has come.
A few facts of interest:
- The mukorossi species is indigenous to China. They are still listed on the books as an “alien” species in India and Nepal, but this is splitting hairs. (The term Chinese soap berry is antiquated at best.) For thousands of years the invasive species migrated southward through eastern Nepal and northern India. Today they are far more established in India and Nepal as agriculture products of international commerce and community incomes – their Fair Trade markets becoming well developed after years of work by local villagers and Southern Asian exporters. China recently began exportation after recognizing a potential for profit. Agricultural products are only a scant few percent (at best) of China’s GDP due to their reputation for low quality control, lack of regulation, common use of toxic chemical fertilizers and pesticides, excessive pollution of both water and air, plus persistently being plagued with worldwide news of hazardous contamination outbreaks.
- They are exceptionally prolific fruit producers. See post on Soap Nuts Sustainability to learn more.
- When growing, patience will be needed. They make take up to 9 years to bare their precious fruits.
- They’re big trees! Can grow to 90′. Allow room.
- Once established, expect them to be live a long time – commonly a century!
Growing Soap Nut Trees from Seed:
(Courtesy L.R. Sacks, www.Soap-Nuts.info)
Initial Note: It is extremely common to see a ring of moldy-looking “white fuzzy stuff” around the umbilical area of the soap nut seed. This is perfectly normal. It does not mean the heart has become rotten nor will it affect germination in any way. No need to wipe it off – and it may even be a good thing.
1. Scarify the seed. Because the soap nut seed coat is so hard, the plant embryo inside cannot breakthrough the seed coat on its own. You must help it by damaging the seed coat. You’ll have to be a little creative. One option is to use a nail file and wear down a notch in the seed coat. I found the seed coat to be so tough that sand paper and fine-grained files did not leave a mark. Another option is to hammer the seed. Be careful not to crush the seed; we just want to weaken the seed coat. I gave about a dozen hard whacks to my seed against concrete, and felt like I was weakening it, but did not see any visible change. Another option is to soak it in hot water. Don’t use water that is actually boiling, but it can still be very hot. I boiled a kettle, let the hot water sit for five minutes, and then filled up a vacuum insulated thermos with the seeds and water, and let it soak for 24 hours. The thermos will keep the water quite warm throughout that period. I used all three methods (filing, hammering, soaking) and it worked ok, but I’m sure there are other good methods too. Soaking is particularly important though, as the water is what activates the germination. If you choose the hammer method be careful not to fully break the outer shell of the seed because once it’s in damp soil it may begin to rot. Remember sapindus mukorossi (and many species of soap berry trees) grow in rough rocky mountainous soil not in wetlands so don’t over water.
2. You need to plant the seed. I would do this in spring or early summer in a pot either outside or in a greenhouse. Choose a pot that is deep, as soap nut trees send down vertical taproots. If you don’t have a deep pot, a 2 liter plastic bottle works well – cut off the top and drill several holes in the bottom. Bury the seed in potting soil (not dirt – use good quality potting/germinating soil) to about three times the seed’s depth. Put it in a place where it will not be in direct sun, and where it can catch some rainfall. Water the pot if the soil starts to dry, but don’t water if it is still moist – that can promote fungal growth. Also, avoid fertilizing the soil before germination occurs – high levels of nitrogen in the soil can actually inhibit germination in general.
3. Wait. Your soap nut seed may take a long time to germinate. It could be 1 month to 3 months, perhaps even more. Not all of the seeds will germinate, but if you follow these directions, you should get 80% or more to grow. Once it does begin to grow, it will shoot up fast. About 1 foot in 1 month should be about right, then it will slow down a little. Give it plenty of full sunlight, and water when soil begins to dry. Again, remember these trees grow in rough rocky mountainous soil not in wetlands so don’t over water.
4. Taking care of the tree. My trees are still very young, so I cannot provide a lot of personal experience. I will be growing mine in progressively larger pots, keeping them on a sunny patio. They should be moved inside once freezing weather begins next winter. Since they are mainly grown in northern India and southern China, they may or may not be able to sustain freezing temperatures. Soap nut tress are known to be and appear generally quite hardy, so should not need a high level of care once well established.