What it is
Sow Thistle (Sonchus oleraceus) is in the Asteraceae (Daisy) family. A dandelion relative whose young leaves are a mild edible green. The milky sap and soft prickles tell it apart.
How to grow it
It wants full sun, water it any, and give it any soil. Target a soil pH around Adaptable. Expect roughly Spring. Annual weed.
How it's used
Sow Thistle is used: young leaves (raw/cooked).
🔎 How to identify it
- Lobed leaves clasping the stem
- Milky sap
- Small yellow dandelion-like flowers
Edibility
How to grow & propagate sow thistle
Everything I've worked out about starting this one, keeping it alive through a Texas year, and turning one plant into many — free.
How to propagate sow thistle
The daisy family is a seed family — those flower heads are seed factories, and most members come up fast and willing from direct sowing. The perennial members (coneflower, black-eyed Susan, the native sunflowers) also clump up over a few years and can be lifted and split in fall or early spring to make free plants and keep the center from dying out.
Growing sow thistle in Texas
Give it full sun and any soil. Match the spot to the plant and most of the battle is already won.
Time your planting to our long warm season and watch the frost dates at both ends; the live weather tool on this site is built for exactly that.
Keep moisture even, especially while it's young — deep, less-frequent soaks build better roots than a daily sprinkle.
Harvesting
Figure on roughly spring before you're harvesting. The part you're after: young leaves.
Making more for free
Every seed we sell is open-pollinated, which means you can save your own from the best plants and it'll grow true next year. Let a few of your strongest plants finish and go to seed, dry it fully, and store it cool and dark. That's the whole point of heirlooms — buy once, grow forever.
Before you forage it
A safety note, because this one grows wild: positive identification comes before anything goes in your mouth or your medicine. Confirm it on several features — leaf, stem, flower, smell — not a single resemblance, check the lookalike warnings, and never forage from roadsides or sprayed ground. When in doubt, leave it out.
Part of the free Texas Roots plant database, compiled by Jordan Polasek from his greenhouse in El Campo, Texas. Free to read and share. If it helped, the best thanks is to grow something.