Honeyberry (Lonicera caerulea) care
Honeyberry -- also called haskap -- is *Lonicera caerulea*, a cold-climate member of the honeysuckle family native to Siberia, Manchuria, and Japan. It bears elongated, blue-purple berries that ripen before strawberries in most temperate gardens -- typically in May-early June in zones 5-7. The.
—- title: "Honeyberry (Lonicera caerulea) care" slug: honeyberry-care hub: plants category: "Fruit tree guide" description: "How to grow honeyberries (Lonicera caerulea), the earliest-ripening small fruit in temperate gardens, including cross-pollination requirements, variety selection, and harvesting." date: 2026-06-10 updated: 2026-06-10 author: "Thomas A." reading_time: 9 scientific: "Lonicera caerulea" zones_min: 3 zones_max: 7 sun: "full sun" —-
Honeyberry — also called haskap — is Lonicera caerulea, a cold-climate member of the honeysuckle family native to Siberia, Manchuria, and Japan. It bears elongated, blue-purple berries that ripen before strawberries in most temperate gardens — typically in May-early June in zones 5-7. The flavor is variable by cultivar and ranges from mild and sweet to intense blue-purple with raspberry and blueberry notes.
Honeyberry is one of the most cold-hardy fruiting shrubs in cultivation. Per UMN Extension, flowers survive temperatures to approximately 21°F (-6°C), making frost-damage crop failure extremely rare even in late cold snaps that routinely damage other early-blooming fruit.
I don't grow honeyberry at my zone 7a Long Island plot, though its cold hardiness and early fruit make it compelling. This guide is sourced from UMN and University of Saskatchewan research resources.
Identification
Per UMN Extension, L. caerulea is a small to medium shrub (3-6 feet tall) with opposite, simple, oblong leaves. Flowers are small and tubular, appearing in early spring before most other fruits bloom. Fruit is elongated (like a stretched blueberry), 3/4-1 inch long, blue-black with a slight waxy bloom.
Do not confuse with invasive honeysuckle shrubs (L. tatarica, L. maackii, etc.) — honeyberry is in the same genus but a completely different species with no invasive tendencies. Check the scientific name.
USDA hardiness zones
Per UMN Extension, L. caerulea is adapted to zones 2-7. It is one of the most cold-hardy fruiting shrubs available. It does not perform well in zones 8-9 because insufficient chilling (800-1,000 hours below 45°F) leads to erratic leafing and poor fruit set.
In zone 7, honeyberry is at the southern edge of its adaptable range and may struggle with insufficient chilling in mild winters.
Pollination
Per UMN Extension, honeyberry is self-unfruitful. Plant at least two genetically different cultivars within 50-60 feet of each other for pollination. The cultivars must have overlapping bloom times. Bloom time is somewhat cultivar-dependent, so match cultivars accordingly.
Per University of Saskatchewan, the broad cultivar groups are:
- Japanese-derived haskap: Earlier bloom; intense flavor; typically paired together
- Russian/Siberian-derived honeyberry: Slightly different bloom timing; milder flavor
- Modern hybrids (U of Saskatchewan cultivars): The most widely recommended for North American gardens; bred for improved flavor, size, and adaptability
Variety selection
Per UMN Extension, newer cultivars from the University of Saskatchewan and UMN have superior flavor:
- Tundra: Strong, complex flavor; highly productive; excellent; good pollinator
- Boreal Blizzard: Mild sweet flavor; large berries; productive
- Boreal Beast: Large berries; good flavor; late-season; zones 2-7
- Indigo Gem: Good flavor; reliable production
- Aurora: Japanese-derived; sweet flavor; must be paired with another Japanese-type
For zone 6-7 growers: choose University of Saskatchewan cultivars (Tundra, Boreal series) — they are better adapted to the shorter winters of the warmer zones.
Light requirements
Per UMN Extension, full sun — 6 hours minimum — for best production. Partial shade produces fewer berries and lower sugar content.
Planting
Per UMN Extension, plant container-grown honeyberry in early spring or fall:
- Spacing: 5-6 feet between plants
- Depth: Same as container; do not plant deeply
- Soil: Well-drained, fertile; pH 5.5-7.0
Honeyberry is less finicky about soil pH than blueberry — it does not require the acidic soil (pH 4.5-5.5) that blueberries need.
Watering
Per UMN Extension, water young plants at 1 inch per week for the first growing season. Established plants are moderately drought tolerant but fruit production is better with consistent moisture. Mulch with 3-4 inches of straw.
Fertilizing
Per UMN Extension, honeyberry is a light feeder. Apply balanced fertilizer (10-10-10 at 1/4 cup per plant) in early spring. Over-fertilization produces excessive vegetative growth at the expense of fruiting.
Pruning
Per UMN Extension, honeyberry needs minimal pruning in its first 5-7 years. After year 5-6:
- Remove the oldest, most unproductive canes at the base
- Thin the interior of the plant to improve air circulation
- Overall plant structure should be maintained as an open, multi-stemmed shrub
Heavy pruning of honeyberry reduces the following year's crop; prune lightly.
Harvesting
Per UMN Extension, harvest honeyberry when berries are fully dark blue-black throughout (not just on the surface), have developed a waxy bloom, and separate easily from the bush. This is typically 2-3 weeks earlier than strawberries in the same zone.
Birds are attracted to the early fruit. Per UMN, honeyberry is one of the first ripe small fruits in the garden; bird pressure can be severe. Net the plants as berries begin to color.
Ripe berries can be shaken from the bush onto a tarp for easy harvest once most berries are ripe simultaneously.
Pests and diseases
Honeyberry has few significant pest and disease problems. Per UMN Extension:
Birds: The primary challenge; net before berries color.
Aphids: Occasional on new growth; treat with insecticidal soap.
Powdery mildew: Occasional; improve air circulation; resistant cultivars generally not needed.
The limited pest load is one of honeyberry's significant advantages over other small fruits.
Common problems
| Symptom | Likely cause | Fix |
|---|---|---|
| No fruit set | Single cultivar; or same cultivar planted twice | Two different compatible cultivars required |
| Bland, tasteless fruit | Old-generation variety | Replace with Tundra, Boreal series |
| All fruit consumed by birds | Early ripening attracts birds | Net before berries turn blue |
| Slow growth and low yield | Partial shade or poor soil | Full sun; soil amendment |
| No production in warm-winter zone | Insufficient chilling | Zone 7 borderline; not recommended for zones 8+ |
Frequently asked questions
Is honeyberry the same as haskap? Per UMN Extension, both names refer to Lonicera caerulea. "Haskap" is the Japanese name for the native subspecies (L. caerulea var. emphyllocalyx) used in Japanese breeding programs. "Honeyberry" is used more broadly for all L. caerulea cultivars. In North American nursery trade, both terms are used; the plant is the same.
What do honeyberries taste like? Per UMN Extension, flavor varies significantly by cultivar. Early Russian-derived cultivars were bland, slightly tart, or vaguely berry-flavored. Modern University of Saskatchewan cultivars (Tundra in particular) have been described as having blueberry-raspberry-black currant flavor intensity. The flavor is best in fruit that is fully ripe — picking too early produces notably inferior fruit.
How long before honeyberry produces fruit? Per UMN Extension, honeyberry typically begins producing fruit in year 2-3 from a container transplant. Full production develops by year 5-6. The shrubs are long-lived and productive once established.
Can I grow honeyberry in zone 7a (Long Island)? Per UMN Extension, zone 7a is at the warm limit of honeyberry's reliable range. In years with sufficient winter chilling, plants in zone 7 can produce well. In mild winters (fewer than 700-800 chilling hours), flower set may be erratic. University of Saskatchewan cultivars developed for milder-zone adaptability are the best choice.
Recommended gear: Best Insecticidal Soap: How Potassium Salts Kill Soft-Bodied Pests — our buyer's guide covering picks for every budget, ranked by Extension publication consensus and personal use.
Sources
- UMN Extension — Honeyberry