The 'Ouachita' Blackberry (pronounced WASH-it-tah) is widely considered the "gold standard" of the University of Arkansas thornless series. Released in 2003, it was bred specifically to combine the best traits of its predecessors: the upright habit of the 'Arapaho' and the high productivity of the 'Navaho'. The 'Ouachita' blackberry produces large, glossy blackberries that are exceptionally sweet and flavorful. The fruit has a firm texture and is typically harvested in mid- to late summer. 'Ouachita' blackberries are known for their high yields and resistance to diseases such as double blossom and orange rust. The canes of 'Ouachita' blackberries are thornless, making them easy to harvest and manage. The plant has a semi-erect growth habit, with canes that may require support as they grow and produce fruit.

Plant Care & Characteristics

Light Requirements: Full Sun. They thrive in full sun exposure, which is essential for promoting vigorous growth, flowering, and fruiting. Adequate sunlight also helps reduce the risk of fungal diseases by promoting air circulation and drying out foliage.

Water Requirements: Moderate; 1-1.5 inches per week during growing season.

Drought Tolerance: Moderate. It handles southern heat better than most, but consistent water is required for the berries to stay plump.

Soil Type: Well-drained soil with good fertility and a slightly acidic to neutral pH level (around 6.0 to 7.0). 'Ouachita' blackberries are relatively adaptable to different soil types, including loamy, sandy, or clay soils, as long as they are well-drained and have good moisture retention.

Deer Resistance: Moderate-Low. Deer will browse the tender spring foliage, though they usually prefer fruit tree leaves if given the choice.

Pest/Disease Resistance: Excellent. It is highly resistant to Double Blossom (Rosette) and Orange Rust. It is generally a very "clean" plant with few disease issues.

Pollination: Self-pollinating. You do not need a second variety for pollination. 

Growth Pattern: Semi-Erect. During the first year of growth, the canes are remarkably thick at the base—often the diameter of a thumb—allowing them to stand tall without leaning. However, because the 'Ouachita' is a heavy producer, a single can can carry several pounds of fruit. It is important to have trellis to support the branches to keep the cane from snapping. A T-trellis is typically the "gold standard" for the 'Ouachita'. 

Harvest: 'Ouachita' blackberry harvest typically runs from mid-June through July, with some harvests extending into August in certain climates (after 'Natchez' and 'Arapaho'). It provides a consistent, long harvest window. 

Harvest Timeline

3 Signs Your 'Ouachita' Berries are Ready to Pick- 'Ouachita' berries are known for being exceptionally sweet, but they need to "cure" on the vine to lose their initial tartness.

1. The "Shine to Matte" Transition: Like its cousins, 'Ouachita' turns black before it is sweet. Pick the berries when the high-gloss shine turns into a duller, "velvety" black.

2. The "Fullness" of the Berry: Look at the individual drupelets (the bumps). They should look plump and "stretched." If the berry looks "tight," it’s still accumulating juice and sugar.

3. The Resistance Test: Touch the berry and apply the slightest pressure. A ripe 'Ouachita' will detach from the vine with absolutely zero effort. If the vine moves when you pull the berry, let it stay for another 24 hours.

Storage and Flavor Profile: 'Ouachita' is consistently rated the highest for "sugar-to-acid" balance. It is a true dessert berry—very sweet with almost no "tang." It is one of the firmest blackberries available. This is great news for you because the berries won't turn into mush in the bowl, and they store beautifully in the fridge for 7–10 days.

Maintenance: Proper pruning and maintenance are essential for maximizing fruit production and maintaining the health of 'Ouachita' blackberry plants. Because this variety is so productive, the canes can become exhausted. As soon as a cane finishes its final berry in July/August, cut it to the ground immediately. This allows the plant to send all its late-summer energy into the new canes that will provide your berries next year. 'Ouachita' blackberries produce fruit on second-year canes, so it's important to remove old canes after they have finished fruiting to make room for new growth.