Fertilising guide

How to fertilise Humulus lupulus (Humulus lupulus)— schedule & NPK

Also called common hop, hops vine, bine.

More about humulus lupulus

About Humulus lupulus

Humulus lupulus · also called common hop, hops vine · edible

Humulus lupulus, the common hop, is a vigorous herbaceous perennial climber grown for the papery green cones (strobiles) used to flavour and preserve beer. Its rough, twining bines spiral clockwise up supports to 6 m each season, dying back to a hardy rootstock in winter and re-emerging strongly each spring.

Growth habit: Herbaceous perennial bine that twines clockwise up supports with rough, clinging stems; dies back to the rootstock each winter and regrows vigorously each spring.

Watch for — Poor first-year crop: Newly planted hops put energy into roots and yield few cones in year one. Patience and good feeding bring full harvests from the second year.

What fertiliser humulus lupulus actually wants — and why

Humulus lupulus feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for humulus lupulus: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed humulus lupulus, and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For humulus lupulus:

Feed generously: a nitrogen-rich feed in spring as bines emerge, then a balanced feed monthly into midsummer. Mulch with compost or well-rotted manure to sustain the heavy seasonal growth. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).

The dormant-season rule matters more than the exact interval: skip feeding entirely when humulus lupulus is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for humulus lupulus

Follow the crop-feed label rate for humulus lupulus — these are calibrated for hungry vegetables. Consistency through fruiting matters more than strength; erratic feeding causes problems like blossom-end rot.

Feeding always goes onto already-damp soil, never dry roots — water humulus lupulus first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the humulus lupulus watering schedule.

Signs you are over-feeding humulus lupulus

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for humulus lupulus:

Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen).
Lush foliage hiding the crop; soft growth prone to pests and disease.
Salt crust on the soil and scorched leaf edges in containers.

Signs you are under-feeding humulus lupulus

Pale, yellowing lower leaves and stunted growth.
Small fruit, poor set, and a quickly exhausted plant.
Blossom-end rot and weak cropping from erratic or insufficient feeding.

If the symptoms point at watering, light or roots rather than nutrition, the full humulus lupulus care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

In containers, fertiliser salts build up fast — water humulus lupulus thoroughly so excess drains from the base each time, and flush pots with plain water every few weeks to prevent a damaging salt build-up.

Organic vs synthetic feeds for humulus lupulus

Organic options

Garden compost or well-rotted manure dug in before planting, plus a liquid comfrey or seaweed feed once fruiting starts. UK: comfrey feed or organic Tomorite; US: Espoma Tomato-tone or Neptune's Harvest. Builds soil and feeds in one.

Synthetic / liquid feeds

A balanced feed at planting then a high-potash tomato feed in fruiting — UK: Growmore at planting then Tomorite (Levington) or Phostrogen; US: a balanced 10-10-10 then Miracle-Gro Tomato or a bloom booster.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising humulus lupulus — frequently asked questions

What fertiliser does humulus lupulus need?

Balanced (even N-P-K) at planting for roots and frame, then switch to a high-potassium ("high-potash") tomato-style feed once the first flowers open — potassium is what sizes and ripens fruit, not nitrogen. Humulus lupulus feeds in two distinct phases — balanced to build the plant, then high-potassium the moment flowering starts to set and fill a heavy crop.

How often should I feed humulus lupulus?

Feed generously: a nitrogen-rich feed in spring as bines emerge, then a balanced feed monthly into midsummer. Mulch with compost or well-rotted manure to sustain the heavy seasonal growth. Feed generously: a nitrogen-rich feed in spring as bines emerge, then a balanced feed monthly into midsummer. Mulch with compost or well-rotted manure to sustain the heavy seasonal growth. So: a balanced feed or compost at planting, then a high-potash liquid every 1-2 weeks from first flower through harvest across the main season (spring through early autumn).

What strength of feed for humulus lupulus?

What does over-feeding humulus lupulus look like?

Vigorous dark-green leafy growth but few flowers or fruit (excess nitrogen). Lush foliage hiding the crop; soft growth prone to pests and disease. Salt crust on the soil and scorched leaf edges in containers. Staying on a high-nitrogen feed once humulus lupulus starts flowering is the classic error — you get a huge leafy plant and a disappointing crop. Switch to high-potash the moment flowers appear.

Should I flush the soil of humulus lupulus?