Sweet Pea

Intensely fragrant climbing flowers. The more you pick, the more they bloom — a British garden essential.

Establishing this month

First sprouts in 14–21 days

Sow

Feb – Apr

Plant Out

Apr – May

Harvest

Jun – Sep

Type

Both

Difficulty

Growing Calendar

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sow

Transplant

Harvest

This month: Apr

Move seedlings outside carefully

•Harden off plants
•Prepare soil outdoors
•Space plants correctly
•Water well after planting

Sowing Guide

What you'd find on the seed packet

Sow Depth

2.5cm

Spacing

20cm

Germination

14–21days

Thinning

Thin to one plant per 20cm after germination

Grower's Note

Soak seeds overnight before sowing to improve germination. Nick the seed coat lightly with a nail file for hard-coated varieties.

Growing Stages

Approximate weeks from sowing to harvest

Sprouting

1wks

Seeds germinate and first leaves emerge. Keep warm and moist.

Establishing

6wks

Root system develops and plant builds structure. Pot on if needed.

Maturing

8wks

Plant reaches full size and begins producing. Harvest at peak.

Total~15 weeksfrom seed to harvest

Companion Plants

BeansPeasNasturtiumMarigoldSunflower

Climate Control

Today

—C

Humidity

—%

Water

Every 2–3 days

Sunlight

6+ hours direct sun

Watch Out For

! Powdery mildew in dry conditions — water at the base
! Aphids cluster on soft growing tips
! Mice eat seeds — protect early sowings with wire mesh

What You'll Need

Equipment for growing sweet pea

Modular Seed Tray

96-cell for precision sowing

Fine Rose Watering Can

Gentle shower for seedlings

Bamboo Canes

Pack of 20 × 120cm

Affiliate links — we may earn a small commission

Just Seed Shropshire Seaweed

Grown Organically

Every method in this guide works with natural systems — no synthetic chemicals, no shortcuts.

Read our approach

Related Crops

Peas

Sweet and tender straight from the pod. Easy to grow with the right support in place.

Sunflower

Active

Bold and cheerful. A favourite with pollinators and a natural companion to vegetables.

Marigold

Active

A companion planting essential. Deters pests and brings colour to any growing space.

Nasturtium

Active

Edible flowers with a peppery kick. Thrives in poor soil and needs almost no attention.

Sweet Pea

Growing Calendar

Sowing Guide

Growing Stages

Companion Plants

Climate Control

Watch Out For

What You'll Need

Related Crops

Peas

Sunflower

Marigold

Nasturtium

Seasonal Updates