
Woodland Sunflower
Helianthus divaricatus
Grow Time
90-120 days
Sunlight
Partial Shade
Watering
Every 5-7 days
Toxicity
Non-toxic
How to plant Woodland Sunflower: Step-by-Step Guide
Growing Guide
Preparation
What you'll need:

Woodland Sunflower seeds (you can find them at garden centers or online)

A patch of soil in your yard, ideally shaded or semi-shaded

Regular garden soil, or enriched soil if your ground is particularly poor

A small trowel or gardening tool to help with planting
When to start:
Woodland Sunflowers are pretty hardy and can be planted either in early spring or fall. Spring planting is ideal if you want to see them bloom in the same year, while fall planting allows the seeds to naturally settle over winter and sprout when conditions are right.
Choosing a spot:
While most sunflowers love full sunlight, Woodland Sunflowers prefer partial shade or dappled sunlight, just like they would get in a forest. So look for a spot that gets some morning sun but has shade during the hotter parts of the day—like under trees or near a fence.
Tip: If you don't have a garden space, you can plant these in large pots and place them on a shaded balcony or patio.
Planting

If you’re planting seeds:
- Loosen up the soil where you want to plant using a small trowel or your hands. You don’t need to dig too deep; just make sure it’s loose enough for roots to grow easily.
- Scatter the seeds over the soil or plant them about 1 inch apart if you’re being more precise. Don’t bury them too deep—just lightly cover them with a thin layer of soil (about ¼ inch).
- Water the area gently after planting. You want the soil moist but not soaking wet.
- Keep checking on the soil every few days to ensure it doesn’t dry out completely. Germination usually happens within 1 to 2 weeks, depending on the temperature.
If you’re transplanting seedlings:
- Dig a hole slightly larger than the root ball of your seedling.
- Place the seedling into the hole, making sure the top of the root ball is level with the surrounding soil.
- Gently pat the soil around the base of the plant to secure it.
- Water immediately after planting.
Tip: Space the plants about 12 to 18 inches apart so they have room to spread out as they grow.
Growing Care




Watering:
- Woodland Sunflowers are fairly drought-tolerant, but they’ll grow best if you water them regularly, especially during dry spells.
- Aim to water deeply once a week rather than giving them a little bit every day. This encourages deeper root growth.
- Check the soil—if the top inch feels dry, it’s time to water.
Fertilizing:
- These flowers don’t need heavy feeding, but a light dose of general-purpose fertilizer in early spring can give them a boost.
- Alternatively, you can mulch around the base of the plants with compost or leaf mold to provide slow-release nutrients.
Weeding:
- Keep the area around your Woodland Sunflowers free from weeds, which can compete for nutrients and water. Be careful when weeding near the roots, though, as these plants don’t like their roots disturbed.
Support:
- While Woodland Sunflowers aren’t as tall as regular sunflowers, they may still need a bit of support if they start leaning. You can use small stakes and loosely tie the stems if necessary.
Tip: Deadhead (remove spent flowers) regularly to encourage more blooms throughout the season!
Harvesting

When to harvest seeds (optional):
If you'd like to collect seeds for next year or to share with friends, wait until the flower heads start to droop and turn brown. The back of the flower head will also become dry and brittle.
- Cut the flower head off the stem, leaving a few inches of stem attached.
- Hang the flower head upside down in a cool, dry place for a week or two to allow the seeds to fully dry.
- Once dried, simply rub the flower head gently to release the seeds.
Using flowers for bouquets:
Woodland Sunflowers make lovely cut flowers! When the blooms are fully open, cut the stems in the early morning when the flowers are freshest. Place them in a vase with water, and they’ll last several days indoors.
Tip: If you're not harvesting seeds or cutting flowers, leave the blooms on the plant to attract birds and pollinators later in the season!
Plant Care FAQ
Q: Do Woodland Sunflowers need full sun?
A: Unlike regular sunflowers, Woodland Sunflowers prefer partial shade or filtered sunlight. They thrive in spots that mimic woodland environments—think morning sun with afternoon shade.
Q: How do I stop my Woodland Sunflowers from spreading too much?
A: These plants can spread through rhizomes (underground stems). To control their spread, you can dig up excess growth in the spring or fall and either replant it elsewhere or share it with fellow gardeners.
Q: Why are my Woodland Sunflowers leggy (tall and spindly)?
A: This often happens if the plants are reaching for more light. Try moving them to a brighter location, or prune nearby plants that might be shading them too much.
Q: Can I grow Woodland Sunflowers in containers?
A: Yes! Make sure the container is large enough (at least 12 inches deep) and use well-draining potting soil. Just keep an eye on watering since containers dry out faster.
Q: Are Woodland Sunflowers invasive?
A: They can spread, but they're not considered highly invasive. Regular maintenance and dividing the plants will help keep them in check.
Pro Tips
1. Natural pest control:
Woodland Sunflowers are great at attracting beneficial insects like bees and ladybugs, which can help keep pests away from your other plants.2. Companion planting:
Plant these alongside other shade-loving perennials like hostas or ferns to create a beautiful woodland garden effect.3. Low-maintenance beauty:
Once established, Woodland Sunflowers are quite hardy and require minimal care—perfect for beginner gardeners or those with busy schedules!4. Extend the blooming period:
Deadheading spent flowers (removing old blooms) will encourage the plant to produce more flowers, extending the blooming season.5. Wildlife-friendly:
Let some flowers go to seed at the end of the season to feed birds like finches and chickadees during the colder months.6. Fall color bonus:
Even after flowering, the seed heads add visual interest in the fall and winter garden, plus they provide food for wildlife.7. Divide and conquer:
Every few years, dig up and divide the clumps of Woodland Sunflowers in early spring or fall to prevent overcrowding and rejuvenate the plants.