Common Purslane (Portulaca oleracea)

I'm finally getting around to studying some of the typical weeds I find myself pulling regularly in the garden. I suspect many of them are edible and hope to try eating some, since I'm pulling them anyway! Now is the time to learn while the plants await next spring. So today I'm learning about:

Common Purslane (Portulaca oleracea), also known as Verdolaga, Pigweed, Little Hogweed or Pusley.

Photo by José Luis Gálvez

Summarized from the Wikipedia article linked above (see article for references) unless otherwise referenced:

Apparently the leaves, stems and flower buds (the latter of which I've never seen) are edible and in fact eaten regularly in Europe, Asia and Mexico. There are 40 varieties cultivated. The plant has adapted to grow extensively from North Africa, through south Asia to Australia during past centuries. There is some evidence of this species in North America in the pre-Columbian era. The little yellow flowers appear only if rainfall conditions are optimum and only for a few hours on sunny mornings. Likely why I've never seen them. Like most weeds, the plant grows well in poor quality, drought-prone soils.

Purslane is a succulent herb reported to have a peppery, slightly sour and/or salty taste and can be eaten similar to spinach (fresh in salads, stir-fried or cooked). It is considered to have similar taste to spinach and similar texture to okra [>]. It is also good in soups due to its mucilaginous quality. At one time Australian Aborigines used the seeds to make seedcakes. It is best harvested in morning or evening [>].

Purslane contains more Omega-3 fatty acids (alpha-linolenic acid in particular) than any other leafy vegetable plant. It contains an extraordinary amount of EPA (Eicosapentaenoic acid) for land based vegetable sources. EPA is an Omega-3 fatty acid normally found mostly in fish, some algae and flax seeds. But note that fish oil typically contains 750 mg/tsp of EPA (source: bottle in our fridge) compared with 0.01 mg/g in Purslane. Doing the math, you need to eat 75 kg of Purslane to get the equivalent EPA from 1 tsp of fish oil. Purslane also contains vitamins (mainly vitamins A, C, some B and carotenoids), as well as dietary minerals, such as magnesium, calcium, potassium and iron. It also contains potent antioxidants.

Hmm, maybe I can cut back on my vegetable plantings and encourage growth of Purslane instead!

Roofing and Soil Quality

Lately we have been pondering the potential impacts, real or imagined, of various roofing materials and potential impacts to garden soil quality.

Because about 80% of our watering supply is from roof-fed rainbarrels into a very intensive small-sized vegetable plot, the roofing material we choose to replace our battered asphalt shingles could theoretically have some long-term impact on our garden soil quality. However, there does not seem to be much readily available data on the topic (or at least not that I've yet found).

I have started to compile some info but thought I'd throw this post out in case some passer-by could recommend some info related to this topic. We are leaning toward a metallic roofing material, for several reasons. Metal roofing generally seems to be the preference for rain water collecting, provided it does not use large amounts of lead in the coating.

More to follow on this subject.

Homemade Pea Sheller

Having grown up on a farm, I can appreciate the labour-saving advantage machines provide for larger-than-backyard scale agricultural work. As a child I was fascinated by the various machines littering our farm in all their mechanical complexity and glory (and sometimes lack of).

Gradually with age I have come to avoid mechanical complexity as much as possible (for various reasons, esp. $$$) and enjoy the simple but effective, quiet, non-motorized hand-held tools of the backyard garden. But I must admit my aunt's homemade pea sheller seems like a great idea for both rural and urban agriculture. Shelling peas from a large garden can become tedious!

Step 1: Load peas into inner threshing cylinder.

Step 2: Set wire-mesh door in place onto the cylinder. The wire-mesh holds the pods while the peas fall through.

Step 3: Close outer screened hatch and slide pea collection tray below the wire-mesh cylinder. The outer screen keeps the peas from flying all over the place.

Step 4: Turn crank (various methods, see below).

The pulleys on the right side spin the inner paddles inside the threshing cylinder at a speed faster than the hand crank. The pulleys on the left turn the outer paddles & wire mesh cylinder at a slower speed than the hand crank. This causes the pea pods to get a real paddling, gradually split open and separates the peas from the pods. The peas fall through the wire-mesh onto the collection tray below while the pods remain inside the wire-mesh cylinder.

The pea sheller was built using plans from Saskatchewan Agriculture's website.

I'm thinking this could be a great project for a community garden. This is one option of many for such a device, but seems to be effective.

For those overwhelmed by the thought of turning a crank for a lengthy time, they can always try my aunt's method of attaching an electric drill to the crankshaft. Even my uncle was convinced after first scoffing at this method. My aunt left to pick some more peas leaving my uncle to operate the crank. When she returned, she found him using the drill!