Common Hop
Humulus lupulus
Humulus lupulus, commonly known as Common Hop, is a fast-growing perennial vine prized for its aromatic cones used in brewing beer. Originating from Europe, this plant is not only beautiful but also beneficial, attracting pollinators and enhancing garden aesthetics.
Everything it needs
9 essentials at a glance
Watering
Humulus lupulus prefers consistently moist soil, especially during the growing season.
Water deeply once a week, ensuring the soil is well-drained. In hotter months, increase frequency to twice a week if the soil dries out quickly. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and crispy leaf edges.
Light
This plant thrives in full sun, requiring at least 6-8 hours of direct sunlight daily.
Ideal placement is in an area with good air circulation and protection from strong winds. While it can tolerate partial shade, reduced light may lead to weaker growth and fewer cones.
Soil
Humulus lupulus prefers well-draining, loamy soil with a pH range of 6.0 to 7.0.
A mix of garden soil, compost, and sand is recommended to ensure good drainage. Avoid heavy clay soils that retain too much moisture, as this can lead to root rot.
Humidity
This plant enjoys moderate humidity levels, around 40-60%.
To increase humidity, mist the leaves or place a humidity tray nearby. Signs of low humidity stress include browning leaf tips and leaf drop, while excessive humidity can lead to fungal diseases.
Temperature
Humulus lupulus thrives in temperatures between 60-75°F (15-24°C) and is hardy in zones 3-8.
It can tolerate cold winters but may die back in extreme heat. During summer, ensure adequate water to prevent heat stress.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 during the growing season.
Fertilize every 4-6 weeks from spring to early summer. Signs of nutrient deficiency include yellowing leaves (nitrogen), poor growth (phosphorus), and small cones (potassium).
Pruning
Prune in late winter or early spring before new growth begins.
Use sharp, clean pruning shears to remove dead or weak stems, promoting healthier growth. Deadheading is not necessary, but removing spent flowers can improve appearance.
Repotting
Repotting is typically needed every 2-3 years or when the plant outgrows its container.
Signs include roots growing out of drainage holes or stunted growth. Choose a pot that is 1-2 inches larger in diameter and follow these steps: gently remove the plant, loosen the roots, place it in the new pot with fresh soil, and water thoroughly.
Propagation
Propagation can be done through division or stem cuttings.
For division, dig up the rhizomes in early spring and separate them into sections with at least one bud each. For stem cuttings, take 6-inch cuttings in late spring, dip them in rooting hormone, and plant them in moist soil. Both methods are best done in early spring.
When it's unhappy
Powdery mildew
Why it happens
High humidity and poor air circulation.
How to fix it
Improve air circulation, avoid overhead watering, and apply fungicides if necessary.
Yellowing leaves
Why it happens
Nutrient deficiency or over-watering.
How to fix it
Check soil moisture and adjust watering schedule, and fertilize if nutrient deficiency is suspected.
Wilting
Why it happens
Under-watering or root rot.
How to fix it
Ensure consistent watering and check for root rot by inspecting roots for mushiness.
Pests (aphids, spider mites)
Why it happens
Dry conditions and poor plant health.
How to fix it
Introduce beneficial insects, use insecticidal soap, and maintain proper humidity.
Stunted growth
Why it happens
Poor soil quality or inadequate light.
How to fix it
Test soil pH and nutrients, amend as needed, and ensure the plant receives sufficient sunlight.
Care through the year
Spring
In spring, focus on watering and fertilizing as new growth appears. Prune any dead stems and prepare for climbing support.
Summer
During summer, ensure consistent watering and monitor for pests. Fertilize every 4-6 weeks to support vigorous growth.
Fall
In fall, allow the plant to die back naturally. Reduce watering and prepare for winter by cutting back dead stems.
Winter
In winter, protect the roots with mulch and avoid watering. If in a pot, move it to a sheltered location to prevent freeze damage.
Toxicity & Safety
Humulus lupulus is generally non-toxic to pets and children. However, ingestion of large quantities may cause mild gastrointestinal upset. Always consult a veterinarian if ingestion occurs.
Good to know
How often should I water my Humulus lupulus?
Water your Common Hop once a week, ensuring the soil remains consistently moist. In hotter months, increase to twice a week if needed.
What is the best light for growing hops?
Humulus lupulus thrives in full sun, requiring at least 6-8 hours of direct sunlight daily for optimal growth and cone production.
How do I propagate Common Hop?
You can propagate Humulus lupulus through division or stem cuttings. Division is best done in early spring, while cuttings should be taken in late spring.
Why are my hop leaves turning yellow?
Yellowing leaves can indicate over-watering or nutrient deficiency. Check soil moisture and consider fertilizing if nutrients are lacking.
When should I prune my hops?
Prune your Humulus lupulus in late winter or early spring before new growth starts to encourage healthier stems and better yields.
What soil type is best for hops?
Humulus lupulus prefers well-draining loamy soil with a pH of 6.0 to 7.0. A mix of garden soil, compost, and sand works well.
What pests affect Common Hop plants?
Common pests include aphids and spider mites. Maintain humidity and introduce beneficial insects to help control these pests.
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