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Semi hardy seeds

Shop semi hardy seeds and grow with confidence from seed

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Used at RHS Chelsea Flower Show
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Showing Seeds Hardiness : Semi hardy clear all
26 items
Verbena bonariensis

Best Seller

25% off

Verbena bonariensis
From £2.62
approx 250 seeds
3 × packets (approx 750 seeds)
9cm pot
2 litre pot
+ 3 more available
0.75 star 1 star 1 star 1 star 1 star 4.7 5 156 (156)
Salvia rosmarinus

Best Seller

25% off

rosemary
From £1.87
approx 60 seeds
9cm pot
2 + 1 FREE 9cm pots
2 litre pot
0.5 star 1 star 1 star 1 star 1 star 4.5 5 8 (8)
Muhlenbergia capillaris

Best Seller

25% off

Muhlenbergia capillaris
From £2.99
approx 20 seeds
2 litre pot
3 × 2 litre pots
1 star 1 star 1 star 1 star 1 star 4.9 5 8 (8)
Verbena officinalis var. grandiflora Bampton

25% off

Verbena officinalis var. grandiflora 'Bampton'
From £2.62
approx 50 seeds
9cm pot
3 × 9cm pots
6 × 9cm pots
0.75 star 1 star 1 star 1 star 1 star 4.8 5 10 (10)
Dahlia merckii

New

25% off

Dahlia merckii
From £4.49
approx 10 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 2 (2)
Cosmos bipinnatus Purity

25% off

Cosmos bipinnatus 'Purity'
From £2.24
approx 100 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 19 (19)
Papaver rhoeas Amazing Grey

25% off

Papaver rhoeas 'Amazing Grey'
From £2.17
approx 250 seeds
0.5 star 1 star 1 star 1 star 1 star 4.5 5 2 (2)
Verbena rigida Santos

25% off

Verbena rigida 'Santos'
From £2.24
approx 40 seeds
9cm pot
3 × 9cm pots
0 star 0 star 1 star 1 star 1 star 3.0 5 2 (2)
Cosmos bipinnatus Rubenza

25% off

Cosmos bipinnatus 'Rubenza'
£2.49 £1.87
approx 30 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Elegant cutting garden collection

25% off

Elegant cutting garden collection
£13.16 £9.87
1 × collection
Pastels cutting garden collection

25% off

Pastels cutting garden collection
£28.62 £21.46
1 × collection
Bupleurum rotundifolium Griffithii

25% off

Bupleurum rotundifolium 'Griffithii'
£2.99 £2.24
approx 125 seeds
Echium vulgare

25% off

Echium vulgare
£2.99 £2.24
approx 35 seeds
0 star 0 star 0.25 star 1 star 1 star 2.3 5 3 (3)
Geranium palmatum

New

25% off

Geranium palmatum
From £2.24
approx 60 seeds
9cm pot
3 × 9cm pots
6 × 9cm pots
Ruffling skies cutting garden collection

25% off

Ruffling skies cutting garden collection
£15.05 £11.29
1 × collection
Summer pudding cutting garden collection

25% off

Summer pudding cutting garden collection
£28.53 £21.40
1 × collection
Blue and white cutting garden collection

25% off

Blue & white cutting garden collection
£11.36 £8.52
1 × collection
Cherry creme brûlée cutting garden collection

25% off

Cherry créme brûlée cutting garden collection
£25.33 £19.00
1 × collection
Simple white cutting garden collection

25% off

Simple white cutting garden collection
£5.88 £4.41
1 × collection
Sugared almonds cutting garden collection

25% off

Sugared almonds cutting garden collection
£28.62 £22.19
1 × collection
Summer nights cutting garden collection

25% off

Summer nights cutting garden collection
£28.43 £21.32
1 × collection
Heritage sweet pea seed gift box

25% off

Heritage sweet pea seed gift box
£22.99 £17.24
gift set
Dark and rich sweet pea collection
Dark & rich sweet pea collection
£9.37 £7.03
available to order from autumn
Lavish and lush sweet pea collection
Lavish & lush sweet pea collection
£9.37 £7.03
available to order from autumn
Echium pininana
Echium pininana
From £3.37
available to order from autumn
Geranium Maderense

New

Geranium Maderense
From £2.62
available to order from autumn

Semi hardy seeds make it easier to choose seeds that fit the way you want to garden. Starting from seed gives you more choice, good value and the satisfaction of watching plants grow from the very beginning. Whether you are filling a few pots, planning a border, refreshing a patch of lawn or growing food for the table, the right seed choice helps you get moving with confidence.

At Crocus, the seed range is carefully selected to support everyday gardeners as well as those with a clear plan in mind. You can explore flower seeds, vegetable seeds, herbs, wildflower mixes, lawn seed and practical growing kits, with product details that help you compare timing, space, colour and conditions before you buy.

Semi hardy seeds help you understand how much protection young plants may need. It is a practical way to choose seeds around the conditions you can offer, from sheltered starts to tougher outdoor planting.

Order online and have your seeds delivered to your door, ready for your next sowing session. With Crocus expertise behind the range, you can choose popular varieties, plan useful combinations and build a garden that feels more productive, more colourful and easier to manage.

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© Crocus.co.uk Ltd 2026. All rights reserved.