Shrub · Caprifoliaceae
Honeyberry
Lonicera caerulea
Plant two cultivars together for the earliest berry of the year, sweet-tart and frost-tough.
Full sun
Every 5–7 days
USDA 2–7
4–6 ft · 1.2–1.8 m
Overview
Honeyberry, also called haskap, is the edible-fruited honeysuckle, and its long blue berries are usually the first fruit you pick all year. It belongs to the honeysuckle family and grows wild along riverbanks and damp northern ground, which is why it wants steady moisture rather than a dry corner. The berries taste like a cross between a blueberry and a raspberry, good fresh off the bush or frozen for later.
What sets this shrub apart is how tough it is. The wood survives down to -45°C (-49°F), and the early flowers shrug off frost to about 19°F, so a late cold snap rarely costs you the crop. It is also forgiving about soil, taking anything from acidic ground up to chalky, limey beds, which is a real break from the fussy blueberry.
The one thing it asks for is company. A single bush flowers hard and then sets almost no fruit, because haskap can't pollinate itself. Plant two unrelated cultivars that bloom together and the bees do the rest, leaving you with heavy clusters of berries by late spring.
Care
The short version: give it full sun and steady moisture, plant a second compatible cultivar close by for pollination, and net the bushes against birds when the early berries start to color.
Light
Honeyberry fruits best in full sun, though it will take partial sun or light shade. Where summers run hot, a little afternoon shade actually helps it cope with the heat it isn't built for.
Water
This is not a drought plant. Coming from riverbanks and damp ground, it wants a deep soak every 5 to 7 days, and more often through a heat wave. Drip irrigation keeps the moisture even without wetting the foliage.
Soil
Plant in moist, well-drained loam. Honeyberry is unusually adaptable and handles a pH from 5.0 to 8.0, even chalky, calcareous soils that most berries refuse, so you rarely need to amend the ground for it.
Temperature
Few fruit shrubs are this hardy. The wood survives from -45°C to 30°C (-49°F to 86°F), and the spring flowers take frost down to about 19°F, but sustained summer heat past zone 6 stresses the plant.
Humidity
Ordinary outdoor humidity in the 40% to 70% range suits it well. Good airflow matters more than any exact number, since crowded, still air is what invites powdery mildew late in the season.
Feeding
Feed once in early spring with a balanced granular such as 16-16-16, about a half cup per plant. Skip late-season nitrogen, which pushes soft growth that won't harden off before winter.
Pruning
Leave a young bush mostly alone for its first 3 to 4 years, cutting out only dead or damaged wood. From around year 6, thin up to 25 percent of the oldest branches each winter while it's dormant to keep the canopy open and fruitful.
Repotting
This is an in-ground shrub, not a container plant, so repotting rarely comes up. If you do start one in a pot, move it to its permanent spot once roots begin circling or water runs straight through.
Size & spacing
A mature bush reaches about 4 to 6 feet (120 to 180 cm) tall and roughly as wide. Give it the same spread in spacing so air moves freely and a pollinator partner sits within reach of the bees.
When to plant
Honeyberry runs on an early clock. Set new plants out in early spring or early fall, watch for cream-yellow flowers in the very first warm days, and pick the ripe blue berries from late May into mid June, often before the strawberries are even ready.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Early spring or early fall
- Harvest: Blooms very early spring with cream-yellow flowers that tolerate frost to about 19°F; berries ripen late May to mid June, often just before strawberries
Hardiness
USDA hardiness zones: 2–7
Temperature: down to -46°C
Troubleshooting
Most honeyberry trouble comes down to a missing pollinator partner, hungry birds, or summer heat in a climate too warm for it. Match what you see to the symptoms below and the fix is usually straightforward. Catch the early signs and you save the season's crop.
Loads of flowers but almost no berries
Haskap can't pollinate itself, so a lone bush flowers hard and then sets next to nothing. You need a second, unrelated cultivar blooming at the same time, like Tundra paired with Aurora or Honey Bee, planted within about 6 feet so bees can work between them. A few early-spring flowers nearby help pull pollinators in while the weather is still cold.
Fix:
- Plant at least two unrelated cultivars that bloom together (for example Tundra with Aurora or Honey Bee)
- Site them within about 6 ft of each other to aid bee transfer
- Encourage early-spring bees with companion flowers
Dusty white film on the leaves late in the season
This is powdery mildew, and it tends to show up after harvest when the air is warm and still. It rarely costs you fruit, but it can strip a bush of its leaves early. Pull off the worst foliage, open up the spacing for better airflow, and lean on resistant cultivars such as Tundra.
Fix:
- Remove and dispose of badly affected foliage
- Improve spacing and airflow
- Choose mildew-resistant cultivars such as Tundra
Scorched leaves and early leaf drop where summers run hot
Haskap is built for the cold, so heat stress hits hard past zone 6, especially with the Russian-type cultivars. The leaves brown at the edges and the bush sheds them early. Give it afternoon shade and steady soil moisture, and choose the Japanese or Kamchatka types, which take warmth far better.
Fix:
- Provide afternoon shade and steady soil moisture
- Use Japanese or Kamchatka-type cultivars better suited to warmth
Berries vanishing or pecked just as they ripen
Birds find haskap before almost anything else in the garden, since the fruit colors up so early. The fix is simple: drape bird netting over the bushes before the berries turn blue, and keep it on through late May and June until you've picked.
Fix:
- Drape bird netting over plants before fruit ripens
- Net in late May through June
Toxicity
Good news here: every part of the honeyberry is safe. The ripe blue fruit is grown as a food crop and eaten by people, and the leaves hold nothing that will harm pets, livestock, or wildlife. The only real caution is not to confuse it with the ornamental honeysuckles, whose red berries are inedible.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Safe around cats. A curious nibble of leaf or berry won't poison them, though eating a lot of any plant can leave a cat briefly queasy.
Dogs None
No concern for dogs. The blue berries are the same edible fruit people eat, and the foliage holds nothing harmful.
Horses Safe
Horses can graze near a honeyberry bush without trouble, since both the fruit and the leaves are free of toxins.
Rabbits Safe
Rabbits are fine around honeyberry. They may nibble the leaves, and a few ripe berries make a harmless treat.
Livestock Safe
Cattle, goats, and sheep can browse it safely. There's no poisonous compound in the plant to worry about.
Birds Safe
Birds love the early fruit and come to no harm from it. Your only real problem is keeping enough berries for yourself.
People Safe
The ripe blue berries are grown as a food crop and eaten fresh, frozen, or in preserves. They are good to eat with no special care.
No special handling required; ripe berries are edible and safe to pick by hand.
Varieties
Most honeyberry cultivars trace back to breeding programs in Russia, Japan, and Canada, and you'll want at least two that bloom together. These are the ones worth knowing.
Tundra
A firm-fruited cultivar that holds up to machine harvest and shrugs off powdery mildew better than most.
Borealis
Carries large berries with a sweet-tart flavor that ranks among the best for fresh eating.
Indigo Gem
A heavy cropper of small, tangy berries that shine in jams, juice, and other processing.
Aurora
A vigorous University of Saskatchewan cultivar with large fruit and a long bloom that makes it a strong pollinizer for the Boreal and Honey Bee group.
Honey Bee
A University of Saskatchewan pollinizer cultivar with tart fruit and an extended bloom that overlaps well with its partners.
Companions
Honeyberry's best neighbors are the ones that help it set fruit: a second compatible cultivar to cross-pollinate, and early flowers that pull bees in while the bloom is still cold.
Plant near
A second unrelated haskap cultivar: Required cross-pollinizer that must bloom at the same time for good fruit set
Early-spring flowering plants such as crocus: Draw bumblebees and bees during haskap's very early bloom, improving pollination
How to propagate
You can grow more honeyberry from cuttings or from seed, but only one of them gives you a true copy of the plant you started with.
Stem cuttingsModerate
Softwood cuttings in early summer or hardwood cuttings taken during dormancy · About 4 to 8 weeks to root; transplant out the following season
Cuttings are the standard way to keep a cultivar true to type. Take softwood in early summer or hardwood while the plant is dormant, dip the ends in rooting hormone to lift your odds, and expect roots in about 4 to 8 weeks. Grow them on and move them out the following season.
SeedModerate
Sow after cold stratification in spring · Several years to first fruiting
Seed is mostly a breeder's tool, not a way to copy a favorite bush. Cold-stratify it and sow in spring, but the seedlings come out variable and won't match the parent, and they take several years to reach first fruit.
Myths
All honeysuckle berries are poisonous, so honeyberries are unsafe to eat.
Many ornamental honeysuckles, like L. tatarica and L. maackii, do carry mildly toxic, inedible berries, which is where the worry comes from. But honeyberry is L. caerulea, the species grown specifically as a food crop. Its ripe blue fruit is non-toxic and eaten fresh, frozen, and in preserves.
Honeyberries need acidic soil like blueberries.
That rule belongs to blueberries, not haskap. Honeyberry handles a wide pH range and even does well on chalky, calcareous ground up around 7.7 or higher, which makes it one of the more soil-forgiving berries you can grow.
A single honeyberry plant will produce a full crop on its own.
Haskap can't fertilize its own flowers. It needs a second, unrelated cultivar blooming at the same time nearby to cross-pollinate, or you get plenty of blossom and almost no fruit.