Yellow Wood Sorrel, Slender Yellow Wood Sorrel
Oxalis dillenii

Family: Oxalidaceae
Genus: Oxalis (oks-AL-iss) (Info)
Species: dillenii (dil-LEN-ee-eye) (Info)

Category:

Perennials

Height:

under 6 in. (15 cm)

Spacing:

6-9 in. (15-22 cm)

9-12 in. (22-30 cm)

Hardiness:

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Late Winter/Early Spring

Foliage:

Smooth-Textured

Other details:

May be a noxious weed or invasive

Drought-tolerant; suitable for xeriscaping

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Suitable for growing in containers

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; direct sow after last frost

Seed Collecting:

Bag seedheads to capture ripening seed

Allow pods to dry on plant; break open to collect seeds

Seed does not store well; sow as soon as possible

Regional

This plant has been said to grow in the following regions:

Seaside, California

Centerbrook, Connecticut

Lakeland, Florida

Yale, Iowa

Lake Arthur, Louisiana

Georgetown, Texas

Hondo, Texas

show all

Gardeners' Notes:

1
positive
1
neutral
1
negative
RatingContent
Positive

On Jul 2, 2014, Chillybean from Near Central, IA (Zone 5a) wrote:

According to the USDA, this is native to the continental United States.
http://plants.usda.gov/core/profile?symbol=OXDI2

This alone will now cause me to leave it alone. We are out in the country and surrounded by industrial crops. Once we learn something is a native, we will let it go on our 9 acres of land. We've started noticing deer on our property recently and the above link mentions, this plant is moderately consumed by large mammals. If there is enough of this for them to eat, just maybe they will stay away from the people food gardens.

Negative

On Jun 18, 2013, plant_it from Valparaiso, IN wrote:

This Yellow Wood Sorrel (O. dillenii) is a European introduction to North America. I don't like it simply because it's not native to my area. It has seed capsules on reflexed stalks.

Look-alikes include:
O. stricta - This perennial plant is native to U.S. and Canada and is usually about 6" tall, but sometimes reaches 1' or a little more. There is a central stem that branches occasionally, creating a bushy effect on mature plants. It is often covered with scattered white hairs. The alternate trifoliate leaves have fairly long petioles, and are about " across when fully open. Depending on environmental conditions, they are light green, green, or reddish green, and fold up at night. Occasionally, they fold up in response to intense sunlight during midday.

... read more

Neutral

On Aug 13, 2009, swamp_thing from Lake Arthur, LA wrote:

This plant also grows wild in Louisiana. You can see them in abandoned lotts, with other clover plants.