Crop type: Squashes
Cucurbita moschata ‘Harrier’ AGM
Common name: Squash (butternut) ‘Harrier’
Crop slug: squash
This Allotment Pro editorial draft summarises the cited RHS cultivar profile and its linked crop guidance. Check the sources and adjust cultivation decisions for local conditions.RHS cultivar profile
1 - Overview
‘Harrier’ is a British-bred butternut squash selected for reliable performance in a short growing season. Its trailing plants produce medium-sized pear-shaped fruits with brown-tan skins and sweet-tasting orange flesh. Crops can be ready just over three months from sowing and are noted for long storage ability.
The combination of early maturity, dependable cropping and storage quality makes ‘Harrier’ especially useful in UK gardens where warmth is limited. It holds the RHS Award of Garden Merit, although the exact profile records the cultivar’s name status as unresolved.
2 - Size
- Ultimate height
- 0.1–0.5 metres
- Ultimate spread
- 1–1.5 metres
- Time to ultimate size
- 1 year
- Habit
- Trailing
The plant stays low but its vines spread beyond the crown. Allow sufficient ground area or guide stems around the bed while keeping swelling fruits supported away from damp soil.
3 - Growing conditions
- Suitable soils
- Loam or sand
- Moisture
- Moist but well drained, or well drained
- Soil pH
- Acid or neutral
Grow in fertile freely draining ground that retains steady moisture during fruit development. Incorporate organic matter before planting, water the root zone consistently and avoid saturating the crown.
4 - Position and hardiness
- Light
- Full sun
- Aspect
- West- or south-facing
- Exposure
- Sheltered
- Hardiness
- H2 — tolerant of low temperatures but not surviving being frozen
Use a warm sheltered site to make full use of the cultivar’s short-season breeding. Transplant only after frost risk and harvest mature fruits before freezing weather.
5 - Colour and seasonal interest
| Season | Flowers | Foliage | Fruit |
|---|---|---|---|
| Spring | — | Young green growth | — |
| Summer | Yellow | Green | Developing brown-tan fruit |
| Autumn | — | Green | Mature brown-tan skin; orange flesh |
| Winter | — | — | Stored mature fruit |
The classic butternut silhouette has a narrower neck above a swollen seed-bearing base. Tan-brown skin and orange flesh provide the principal harvest identifiers.
6 - Botanical details
- Family
- Cucurbitaceae
- Native to Great Britain and Ireland
- No
- Lifecycle
- Annual or biennial
- Foliage
- Deciduous
- Habit
- Trailing
- Name status
- Unresolved
- Award
- RHS Award of Garden Merit
Genus
Cucurbita is a small genus of climbing or trailing annual herbs native to Central and South America. Edible species bear golden-yellow star-shaped flowers and palmately lobed leaves with fine prickly hairs.
Safety
Do not eat bitter fruit or feed it to pets. Wear gloves or other appropriate protection if prickly stems and leaves irritate the skin.
7 - How to grow
Cultivation
The exact profile advises indoor sowing from May to June in good-quality seed compost. Lay seeds flat on their side 1cm deep and maintain a constant 18–21°C. Harden seedlings off and plant in fertile, well-drained soil in full sun after frost risk.
Follow the parent guide for trailing spacing and regular watering. Apply a high-potassium fertiliser regularly once the first fruits begin swelling. Leave fruits to colour and mature, cut with stem attached before frost, cure the skins and store only undamaged specimens.
Propagation
Propagate by seed. Sow separately to reduce root disturbance during planting.
Suggested locations
- Allotment or kitchen garden
- Patio or large container
- Sunny edible border
- Sheltered courtyard garden
Pruning
No pruning is required. Redirect trailing stems when necessary and remove only damaged or decaying material.
Pests
The exact profile describes ‘Harrier’ as generally pest-free. Continue normal checks around seedlings and beneath dense foliage.
Diseases
Grey mould and powdery mildew may occur. Maintain airflow, water at soil level and promptly remove decaying flowers or damaged tissue.