
Common Sowthistle
Sonchus oleraceus
Grow Time
45-60 days
Sunlight
Full Sun to Partial Shade
Watering
Every 5-7 days
Toxicity
Non-toxic
How to plant Common Sowthistle: Step-by-Step Guide
Growing Guide
Preparation
Choosing the Right Spot for Common Sowthistle:
Common Sowthistle is a hardy plant that can grow almost anywhere, but it prefers cooler weather. If you're just starting out, don't stress too much about finding the "perfect" spot; this plant is pretty forgiving and easy to grow!
- Sunlight: It loves sunlight but can also handle some shade. Find a place where it gets at least 4-6 hours of sun daily.
- Soil: Common Sowthistle is not picky about soil—regular garden soil will work just fine. However, make sure it's not too compacted, as the roots need room to spread.
Materials You'll Need:
- Seeds (you can find these online or at gardening stores that specialize in wild plants)
- A pot with drainage holes (at least 8 inches deep) OR a patch in your garden
- Regular potting soil or garden soil
- Watering can
- Fertilizer (optional, but a light vegetable fertilizer works well)
Timing:
You can sow the seeds directly into the ground in early spring or late summer when temperatures are mild. They do best when planted in cooler months, so avoid the hottest part of summer if you live in a warm climate.
Planting

How to Plant Common Sowthistle:
- Prepare the Soil: Loosen up the soil in your chosen area or pot. If you’re planting in the ground, dig a small trench or hole about ¼ inch deep. For pots, fill them with soil and leave about ½ inch of space from the top.
- Sowing the Seeds:
- Sprinkle the tiny seeds lightly over the soil. You don’t need to bury them deep—just cover them with a very thin layer of soil (about ¼ inch). The seeds are small, so be careful not to put too many in one spot.
- Water Gently: After sowing, water the soil gently but thoroughly. Use a watering can with a soft spray so the seeds aren’t washed away.
- Spacing: If you’re planting in a garden bed, try to keep about 6-8 inches between each seed group. In pots, stick to one or two small clusters per pot.
- Wait for Germination: Seeds usually sprout within 7-10 days if kept moist. Keep an eye on the soil and water whenever it feels dry to the touch.
Tip: Once the seedlings have grown a few inches tall, you can thin them out by removing weaker plants, leaving about 6-8 inches between stronger ones.
Growing Care




Taking Care of Your Common Sowthistle:
- Watering Needs:
- Common Sowthistle doesn’t like to dry out completely, but it also doesn’t want to sit in soggy soil. Check the soil every couple of days—if the top inch feels dry, it’s time to water. Water deeply but infrequently to encourage strong root growth.
- Fertilizing: While it’s not necessary, you can give your plant a little boost with some liquid vegetable fertilizer once a month. Just follow the instructions on the bottle, and don’t overdo it—this plant doesn’t need heavy feeding.
- Weeding: Since Common Sowthistle grows fairly quickly, it can compete with weeds. Pull out any weeds you see around your plants to ensure they get enough nutrients and space.
- Pruning: You may notice that the plant starts to flower after a few weeks. If you’re growing it for the leaves (which are edible), pinch off the flowers to encourage more leaf growth. If you want the plant to produce seeds, let the flowers bloom.
- Pests & Problems: This plant is pretty resilient, but watch out for aphids or other small insects. If you see them, simply wash the leaves with a gentle soap-and-water solution or pick them off by hand.
Harvesting

When and How to Harvest Common Sowthistle:
- Leaves: You can start harvesting the tender young leaves when the plant is about 6-8 inches tall. Simply pluck the outer leaves with your fingers or use scissors to cut them close to the base. These leaves are great in salads or cooked like spinach.
- Flowers and Seeds: If you’re interested in collecting seeds, wait until the yellow flowers turn into fluffy white seed heads (similar to dandelions). You can shake the seed heads into a bag to collect seeds for future planting.
Harvesting Tips:
- Always harvest in the morning when the leaves are most hydrated and fresh.
- Regular harvesting encourages new growth, so don’t be shy about picking the leaves often.
- If you plan to eat the leaves raw, younger leaves tend to be less bitter than older ones.
Storage: Store harvested leaves in a plastic bag in the fridge for up to a week. You can also blanch and freeze them if you want to store them longer.
Plant Care FAQ
Q: Is Common Sowthistle invasive?
A: It can spread easily if left unchecked, especially because it produces lots of seeds. To prevent it from taking over your garden, remove flower heads before they go to seed or grow it in a contained area like a raised bed or pot.
Q: Can I eat all parts of the Common Sowthistle?
A: Yes! The leaves, stems, and even young shoots are edible. Leaves can be eaten raw in salads or cooked, while the stems can be peeled and cooked like asparagus.
Q: My Common Sowthistle leaves taste bitter—what can I do?
A: Bitterness is common in older leaves. Try harvesting younger leaves or blanching them in boiling water for a minute before cooking to reduce bitterness.
Q: Why are my plants bolting (flowering) so quickly?
A: Bolting happens when the plant experiences stress, like too much heat or inconsistent watering. Try to keep the soil evenly moist and provide some shade during hot spells to slow down flowering.
Q: Do I need to fertilize Common Sowthistle regularly?
A: Not really—it’s a low-maintenance plant. If you want to encourage faster growth, a light monthly feed with a balanced fertilizer will help, but it’s not essential.
Pro Tips
1. Salad Freshness
Add young Common Sowthistle leaves to your salads for a slightly bitter, nutrient-rich kick similar to arugula or dandelion greens.2. Control Spread
If you want to enjoy Common Sowthistle without letting it take over your yard, grow it in containers instead of the ground.3. Companion Planting
Common Sowthistle attracts beneficial insects like ladybugs and lacewings, which can help control pests in your garden. Consider planting it near vegetables like tomatoes or peppers.4. Easy Propagation
Once you’ve grown your first batch, you won’t need to buy seeds again. Let a few plants go to seed, and they’ll naturally reseed themselves for the next season.5. Natural Mulch
The plant’s dense growth habit helps suppress weeds, making it a great “living mulch” in areas where you want to minimize weeding.6. Medicinal Uses
Besides being edible, Common Sowthistle has been used traditionally as a medicinal herb. Some people brew the leaves into tea to aid digestion or reduce inflammation.7. Quick Crop Rotation
Because Common Sowthistle grows fast, it’s a good option for filling gaps between slower-growing crops in your garden.