Growing Your Own Soapnut Tree

The soap nut tree Sapindus Mukorossi aka Indian Soapberry is a very large tree that produces prodigious amounts of a soaponifying nut that you can use as a greywater safe laundry detergent, dish and hand soap. Mrs. Homegrown wants to rip out my beloved Mission Fig tree to plant the one that Craig at Winnetka Farms gave us last year. I’m going to chain myself to the fig.

That being said, I wish we had more room to plant our soapnut tree. Sapindus Mukorossi requires a fertile soil and a frost free climate. It’s a tall tree that can take as long as ten years to begin fruiting. A friend of mine has one growing in Altadena.

Sapindus Mukorossi needs lots of water. Craig has pointed out the perfect permacultural pairing for our dry climate–use the greywater from your washing machine to water your soap nut tree.

It can be a bit tough to get the seeds to germinate. Here’s some instructions on how to grow Sapindus Mukorossi from seed.

If you’re in LA you can buy a tree from the folks at Winnetka Farms.

I vote for Sapindus Mukorossi as LA’s next street tree . . .

Eight Things to Consider When Saving Vegetable Seeds

seed saving

The directions for seed saving in our last book, Making It, almost got cut. Perhaps we should have just changed those directions to “Why it’s OK to buy seeds.” The fact is that it’s not easy to save the seeds of many vegetables thanks to the hard work of our bee friends.

That being said, Shannon Carmody of Seed Saver’s Exchange gave a lecture at this year’s Heirloom Exposition with some tips for ambitious gardeners who want to take up seed saving. Here’s some of her suggestions:

1. Maintaining varietal purity
Is the vegetable open pollinated or hybrid? Hybrid seeds don’t produce true to type. You can’t save and regrow the seeds of hybrids, at least not without a lot of complicated multi-generational outcrossing in order to create a new variety that produces true to type. [I’ll note that I’m not anti-hybrid. The increased vigor of hybrids can be advantageous if you’re having trouble in your garden.]

2. Know how the vegetable is pollinated
It’s much easier to save the seeds of self-pollinating vegetables such as beans, peas and tomatoes. Remember that bees can fly for miles–anything pollinated by insects have to be isolated or caged to prevent cross-pollination. And many vegetables have weedy cousins. Try to save the seeds of carrots without caging and you may get a carrot/Queen Anne’s lace hybrid that won’t taste good. And some supposedly self-pollinating plants such as tomatoes have rogue varieties that can be cross pollinated by insects.

3. Consider your climate
Bienneals require two years of growth in order to set seeds. If you live in a cold climate that could be a problem.

4. Population size
Serious plant breeders often plant a minimum of sixty plants so that they can choose the most vigorous for seed saving. And they’ll often plant just one variety to reduce the risk of crossing. One way around the population size requirement is to crowd source the problem and get a bunch of friends to grow the same vegetable.

5. Space requirements
Some biennials get really big in the second year. You’ll need to make sure they have space and won’t shade out other plants.

6. When to harvest
Fruits harvested for seed may need to stay on the plant for a long time. For example, eggplants that you want to save seed from need to be harvested well past when they’re still edible.

7. Prepping seeds
In general, seeds harvested when dry, such as lettuce need to be air dried before storing. Seeds harvested wet, such as watermelons, need to be washed with water before drying and storing. Tomato seeds need to be fermented in water for a few days before drying.

8. Storage
Moisture is the enemy of seed storage. Those packs of desiccant that come with electronic gadgets can be recycled and used in your seed storage boxes.

There’s no shame in buying seeds

In our small garden it would be nearly impossible to save the seeds of readily pollinated vegetables such as members of the Cucurbitaceae family. But it would be great to have varieties of vegetables adapted to our dry Mediterranean climate. Most seed saving operations use lots of fertilizer and water and the result is vegetables that are adapted, unsurprisingly, to requiring tons of fertilizer and water. Native Seeds/SEARCH is a notable exception. But we need more regional seed saving groups run by trained horticulturalists. In the meantime I buy seeds and stick to saving just the easy ones–beans, peas and tomatoes.

If you want more information about seed saving the bible of the subject is Suzanne Ashworth’s book Seed to Seed.

How have your seed saving endeavors gone? What seeds do you save? Have you ever gone through the trouble of bagging seed heads or caging plants and hand-pollinating?

Vegetable Garden Note Taking

A page from Thomas Jefferson's garden diary.

A page from Thomas Jefferson’s garden diary.

My worst mistake in the fifteen years we have been gardening here in Los Angeles has been my shoddy note taking. Even though we don’t have frosts to contend with, it still can be tricky to figure out when to plant vegetables.

In a lecture I attnded at the National Heirloom Exoposition, Sonoma County gardening guru Wendy Krupnick had a simple suggestion for what to take notes on in your vegetable garden:

  • variety
  • planting day
  • first harvest
  • last harvest
  • comments

She suggested a minimum of three years of note taking.

If only I had this data! If there isn’t one already, someone should come up with a social note taking app for vegetable gardening that would aggregate information for each local microclimate. Leave a comment if such a thing exists.

And for more great gardening advice from Krupnick, check out iGrowSonoma.org. Most of the info is relevant even if you don’t live in Northern California.

The Connection Between Human Health and Soil Health

What’s the connection between soil and human health? It’s an intriguing question that family physician and author Dr. Daphne Miller discusses in the lecture above and in her book Farmacology: What Innovative Family Farming Can Teach Us About Health and Healing. In the research for the book Miller visited farmers who, as she put it, “farm in the image of nature,” who approach the farm as a living organism.

While she cautioned that there is little research behind the connection between farming practices and health, she suspects that biodiversity on the farm may be an important factor in our well being. To back this idea up she cites:

  • Erika von Mutius, who found an intriguing connection between children who grew up on farms and their lack of asthma and allergies later in life.
  • Research that is taking an Integrated Pest Management approach to cancer, treating it as a symptom of a lack of internal biodiversity.
  • Studies that have shown the higher nutritional value of eggs from chickens raised on pasture.

It seems obvious that there’s a connection between the health of a farm and our own health. Biodiverse soils produce healthier, more nutritious food. And way too much of the food we eat comes from farms where the soil is treated as a sterile growing medium. As Miller notes, “We are the soil.”