
I was going to say just take a snip of the parking lot Purslane and regrow it at home. But I would have been partially wrong. You are right to be cautious...
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Purslane (
Portulaca oleracea) is edible and nutritious, but
where you harvest it matters a lot.
Purslane Safety Considerations
- Parking lot plants: Purslane growing in pavement cracks or parking lots can absorb oil, heavy metals, road salt, and other contaminants from runoff. Even if the plant looks healthy, it may not be safe to eat.
- Snipping a stem: Taking a stem from a contaminated environment doesn’t make the plant itself safer. The pollutants are taken up through the roots and distributed throughout the plant tissue.
- Safer propagation: If you want to grow clean purslane, you can snip a stem from a wild plant and root it in clean soil at home. Purslane propagates easily from cuttings. Once it’s growing in uncontaminated soil, new growth will be safe to eat.
Best Practice
- Don’t eat purslane directly from parking lots or roadsides.
- Do take cuttings and replant them in garden soil, raised beds, or pots.
- Within a few weeks, the plant will establish roots and produce fresh, safe leaves.
Bottom Line
Pulling purslane from a parking lot and eating it isn’t safe because of contamination. But snipping a stem and
re‑rooting it in clean soil is a great way to propagate the plant and ensure the new growth is safe to eat.
View attachment 4267085
The key point is this:
once you move a cutting into clean soil, any new growth will be safe.
How It Works
- Contamination is systemic: A purslane plant growing in a parking lot may have absorbed pollutants (oil, heavy metals, salt) into its tissues.
- Cuttings carry history: If you eat the original stem or leaves from that cutting, you’d still be ingesting whatever contaminants were in the parent plant.
- New growth is clean: Once the cutting is rooted in uncontaminated soil, the plant produces fresh stems and leaves using nutrients from the new environment. Those new parts are safe to eat, because they’re not connected to the polluted substrate anymore.
Best Practice
- You can take a cutting from a parking lot purslane, but only use it to propagate.
- Discard the original stem and leaves after it establishes roots.
- Harvest and eat only the new growth that develops in your clean soil or container.
Bottom Line
A cutting from a parking lot plant will grow into safe purslane in a clean container — but don’t eat the original stem or leaves. Wait for fresh growth, and that will be safe to harvest.
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Well, it sounds like if you want to start growing Purslane again, there is a way to do it safely even if you have to start with a cutting from a parking lot plant. It sounds like a healthy plant to eat and free for foraging. I'm planning on looking for some this spring and transplanting them into pots on our deck.