Herb · Cannabaceae
Hops
Humulus lupulus
Offer them full sun, deep soil, and something tall to climb, and the hop bines will rise into a living green screen and a brewing harvest.
Full sun
Every 2–4 days
120–150 days
USDA 3–8
Overview
Hops are the climbing perennial that lends beer its bitterness and aroma, and in the garden they read as pure architecture. Fast-growing shoots called bines spiral clockwise up any string or trellis, drawing the eye upward as much as 25 feet (7.5 m) in a single season before the whole thing dies back to the ground each fall. The papery green cones of late summer are the season's quiet reward.
There is a practical charm to knowing that hops are dioecious, with each crown male or female and only the females carrying the brewing cones. Because the bines climb by wrapping their rough, hooked stems around a support rather than reaching with tendrils, they want a real structure, a tall trellis or a run of twine that becomes a design feature in its own right. Underground, tough rhizomes push outward, which is why a hop planting will happily annex a corner of a yard if given the chance.
Settled in, hops are hardy and long-lived, weathering winters as cold as -29°F (-34°C) without complaint. The first year goes quietly into roots, and a full show of cones usually waits for the second or third season, a rhythm that rewards a patient gardener. Plant a female cultivar, give it height and steady water, and one crown becomes a fixture that returns year after year.
Care
The short version: hops ask for full sun, deep and rich well-drained soil, and steady moisture through the heat of summer, along with a tall support for the bines and generous room so the rhizomes stay in bounds.
Light
Hops crave full sun, and the more they receive the better they perform, since the bines need long days and strong light to fuel their soaring growth and set fine cones. A little partial sun is tolerated, but shadier corners yield weaker bines and a leaner harvest.
Water
Summer turns hops thirsty, and they drink hard through June and July while the bines climb. Keep the soil consistently moist but never waterlogged, then ease back on watering as the plant dies down in fall.
Soil
Give hops a deep, rich, well-drained sandy loam generous with organic matter, since the roots run deep and the plant feeds heavily. A pH between 6.0 and 6.5 keeps them at their best.
Temperature
Hops hold up across a wide range, riding out winter lows near -29°F (-34°C) and growing well up to about 90°F (32°C). Cold rarely troubles an established crown, which dies back and returns each spring.
Humidity
Outdoor humidity follows the season, so there is no set point to chase. What matters is airflow, because crowded, damp foliage is exactly where downy and powdery mildew take hold.
Feeding
Feed monthly from spring through midsummer with a balanced fertilizer carrying nitrogen while the bines grow, then taper off before the cones set. Such fast growth makes for a hungry plant.
Pruning
In spring, cut second- and third-year crowns to the ground once the bines reach about 2 feet, then keep a few strong shoots and train them clockwise up the strings. Strip the lower leaves for airflow, and cut the bines to the ground after harvest as the plant dies back.
Repotting
Hops are no container plant, so ordinary repotting does not enter the picture. Instead, lift and divide the crowns every few years if the center crowds, the shoots weaken, or the rhizomes begin wandering past their patch.
Size & spacing
A single season can carry the bines up to 25 feet (7.5 m) tall, spreading 3 to 6 feet (91 to 183 cm) wide at the base. Give each crown ample room and a tall, sturdy support so air moves freely and the rhizomes have somewhere to run.
When to plant
Hops keep a graceful annual calendar that anchors a garden's year. Set rhizomes or crowns in early spring once the soil can be worked, train the bines up through the long, easy days of summer, and gather the cones in late August and September before the planting settles down for winter.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Plant rhizomes or crowns in early spring after the soil can be worked
- Harvest: Cones harvested late August through September (late summer to fall)
Hardiness
USDA hardiness zones: 3–8
Temperature: down to -40°C
Troubleshooting
Most hop trouble shows on the leaves, arriving as a fungal disease when the weather turns damp or as a pest in the height of summer. Noticing it early is what saves the season, since anything that reaches the cones costs the harvest. Match what you see below, then step in while there is still time to help.
Yellow patches above, gray-purple fuzz below, and stunted shoots
When a wall of green loses its polish, downy mildew is often the reason, and it settles in during the cool, damp stretches that dull a garden's whole mood. It sends up pale, brittle spikes from the crown, which are worth pulling at once along with any marked leaves. Give the planting more breathing room, water low at the base, and keep it protected while the weather stays gray.
Fix:
- Remove and destroy infected basal spikes and diseased foliage promptly
- Improve air circulation by stripping lower leaves and thinning bines
- Avoid overhead irrigation; water at the base
- Apply a labeled fungicide preventively during cool, wet periods following extension recommendations
White powdery coating on leaves, shoots, and cones
A chalky, felt-like haze over the leaves is the calling card of powdery mildew, and it eventually reaches the cones and leaves them misshapen. Staying ahead of it is largely a matter of good grooming: clip the first infected growth in spring and keep the bines open to sun and moving air. When conditions tip in the fungus's favor, a sulfur spray or another labeled fungicide restores order.
Fix:
- Prune to remove early infected tissue in spring
- Improve air movement and sun exposure
- Apply sulfur or another labeled fungicide per extension guidance
Stippled, bronzed leaves with fine webbing in high summer
In the hot, dry weeks of high summer, twospotted spider mites can quietly dim a green screen, stippling the leaves until they bronze and fall. A leaf tapped over white paper reveals the tiny culprits on the move. A frequent rinse with a strong stream of water, soil that never bakes dry, and a hands-off approach to the predatory mites that patrol for you usually settle the matter.
Fix:
- Wash plants regularly with a strong stream of water
- Conserve beneficial predatory mites and other natural enemies
- Provide adequate but not excessive water and nitrogen
- Apply a labeled miticide if populations escalate
Curled, sticky leaves with clusters of small soft-bodied insects
The hop aphid arrives with spring and lingers all season, massing on leaf undersides and shoot tips and dulling the foliage with a sticky honeydew that draws sooty mold. A weekly glance at the growing tips lets you act before the aphids reach the cones and spoil the harvest that crowns the year. Left to their work, lady beetles and lacewings carry much of the load.
Fix:
- Encourage and conserve natural enemies such as lady beetles and lacewings
- Hose off light infestations with water
- Apply insecticidal soap or a labeled insecticide for heavy early-season or cone infestations
Leaves reduced to a lacy skeleton in midsummer
Come midsummer, Japanese beetles gather to graze the soft leaf tissue, leaving a lacy tracery of veins where a full green curtain once hung. In the cool early hours they move slowly, so a quick pass to pick them into soapy water sets things right. The look is startling, yet an established planting carries on unbothered.
Fix:
- Hand-pick beetles into soapy water in the early morning
- Apply a labeled insecticide during heavy adult flights if needed
Toxicity
For all its beauty in the garden, hops are dangerous to dogs, and that fact deserves real attention. Both fresh cones and the spent hops left after a brew day can trigger a sudden, life-threatening fever, so keep every part of the plant and all brewing waste well out of a dog's reach. Cats, horses, and other animals belong at a distance too, while the cones are what people use to brew beer.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Moderate
Cats belong on the at-risk list as well, and though their cases are fewer than dogs', a curious cat that samples hops can run a fever and turn queasy. Keep cones, dried hops, and brewing leftovers tucked well out of a cat's orbit.
Dogs Severe
This is the grave one. Hops can send a dog into a malignant hyperthermia crisis, with heavy panting, a dangerously high fever, a racing heart, restlessness, vomiting, and seizures that may prove fatal within hours. The spent hops from a home brew day are a common source, sighthounds such as greyhounds face even greater danger, and any ingestion is an emergency.
Horses Moderate
Horses count among the vulnerable too. One that gets into hops may show clear distress and a climbing body temperature, so keep the plant and every trace of brewing waste away from pasture and feed.
Rabbits Caution
The evidence for rabbits stays thin in either direction, so grace favors caution: leave hops off their menu entirely. Offer no cones, no foliage, no trimmings.
Livestock Caution
Cattle, goats, and sheep are best kept clear of hops as a precaution, since the same heat-driven reaction seen in dogs cannot be ruled out. Fence off any plantings, and never leave spent hops where grazing animals might reach them.
Birds Caution
How birds fare with hops remains poorly recorded, so the elegant, safe choice is to keep cones and dried hops away from them altogether.
People Caution
For grown-ups the plant is low-risk, and adults turn the cones into beer and steep them into calming teas that suit a slow evening. Even so, it is no snack for children, and handling the bines can leave a skin rash on some people.
Keep all hops, including bittered/boiled spent hops from brewing, completely away from dogs. Dispose of used hops securely in a sealed, dog-proof container rather than an open compost or trash that pets can reach.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Most gardeners choose a hop for the character it brings to a glass, from bright citrus to a heavy bittering note, though one earns its place on looks alone. These are the names worth knowing.
Cascade
Cascade is the beloved American aroma hop of bright citrus and floral notes, and it has become a staple in home and craft brewing alike.
Centennial
Centennial plays both aroma and bittering roles, and its bold citrus scent has won it the flattering nickname super Cascade.
Chinook
Chinook is a high-alpha bittering hop with a spicy, piney character all its own.
Nugget
Nugget is a vigorous high-alpha bittering cultivar celebrated for its heavy, herbal aroma.
Aureus
Aureus is the ornamental golden hop, chosen for its bright chartreuse foliage rather than for any brewing cones.
How to propagate
Hops are almost always raised from the parent plant rather than from seed, which keeps a named female cultivar true and brings a brewing harvest within reach years sooner.
DivisionEasy
Early spring while dormant · One growing season to establish; full cone production typically by the second or third year
The graceful route to more hops is to divide the perennial crown of an established female plant in early spring while it still sleeps, which keeps the named cultivar true to type. A division finds its feet over a single growing season, though a full crop of cones tends to wait for the second or third year.
LayeringModerate
Spring through early summer · One season to root before separating
Rhizome cuttings and layered lengths of bine root willingly when set out from spring through early summer, taking about a season to root before you part them from the parent. Commercial growers lean on clean, disease-free transplants over field rhizomes to keep mildew away from a fresh planting.
SeedDemanding
Spring · Two or more years to flower and reveal sex
Seed is rarely the elegant choice, since seedlings will not come true to a named cultivar and split into males and females. Sown in spring, they take two years or more to flower and finally reveal their sex, a long wait for a plant whose worth stays unknown.
Myths
Any hop plant will give you cones to brew with.
It is a tempting assumption, but hops are dioecious, so only the female plants bear the papery cones, the strobiles, that brewers prize. Growers keep a male or two for breeding and pollination and pull the rest, because pollinated, seeded cones are a liability for most brewing.
Only beer made from hops is dangerous to dogs, not the plant.
The danger lives in the hops themselves, no beer required. Fresh cones, dried hops, and above all the spent hops left after a brew day can set off a life-threatening high-fever reaction in dogs with no alcohol involved.