Ribes odoratum is a deciduous native shrub of the central Great Plains, valued for its intensely clove-scented yellow flowers in early spring and edible black berries in midsummer. The flowers attract early bumblebees and hummingbirds; ripe fruit draws birds and small mammals. It is one of the more adaptable native shrubs for difficult, dry sites.
The shrub spreads freely by suckers and will colonize a wide area if left unchecked. Full sun yields the best fruit set; part shade is tolerated but reduces production. Average, well-drained soil is sufficient — fertile soil promotes suckering over fruiting. Prefers a slightly acidic to neutral pH. All Ribes species can serve as alternate hosts for white pine blister rust (Cronartium ribicola); avoid planting within several hundred feet of five-needled pines in regions where that disease is active.
The berries are fully edible and used fresh, dried, or cooked in jams, jellies, pies, and wine. They were a staple food for Plains tribes and an important trail food for early settlers. The flowers are also edible.
Powdery mildew
White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.
Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.
Currant and Gooseberry Anthracnose
Small brown spots with yellow margins appear on leaves, enlarging and coalescing to cause premature defoliation. Sunken lesions may develop on infected stems.
Collect and dispose of fallen leaves. Avoid overhead watering. Apply copper-based fungicide at bud swell in late winter and repeat through spring during prolonged wet weather.
White Pine Blister Rust
Orange-yellow spore pustules appear on the undersides of leaves in late summer, followed by yellowing and premature leaf drop on the currant. On nearby five-needled pines, look for elongated sunken cankers with blistered bark producing white or orange spore masses.
Remove and destroy all infected leaves; do not compost. Avoid siting Ribes within several hundred feet of five-needled pines such as eastern white pine, western white pine, and sugar pine. Preventive copper-based fungicide applied at bud break can reduce spore load on the currant in high-risk areas. No curative treatment reverses established infection on pines. Check state and provincial regulations, as Ribes planting may be restricted in some jurisdictions to protect commercial timber.
Fungal leaf spot
Brown or purplish spots on the leaves, often ringed with a yellow halo, that spread and merge in warm, humid, or wet weather; heavily spotted leaves yellow and drop early.
Pick off spotted leaves and clear fallen debris to remove overwintering spores. Improve air circulation by thinning, and water at the base so foliage dries quickly. If it persists, apply a copper- or sulfur-based fungicide at the first sign.