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Seeds to sow indoors in May

Shop seeds to sow indoors in May and grow with confidence from seed

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Used at RHS Chelsea Flower Show
Kitchen garden planting guidelines
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Showing Seeds Sowing month inside or protected : May clear all
50 items
Zinnia elegans Envy

25% off

Zinnia elegans 'Envy'
£2.99 £2.24
approx 100 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Zinnia elegans Purple Prince

25% off

Zinnia elegans 'Purple Prince'
£2.89 £2.17
approx 100 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Zinnia elegans Queen Lime Red (Queen Series)

25% off

Zinnia elegans 'Queen Lime Red' (Queen Series)
£5.49 £4.12
approx 20 seeds
Cerinthe major Purpurascens

25% off

Cerinthe major 'Purpurascens'
From £2.62
approx 12 seeds
0.75 star 1 star 1 star 1 star 1 star 4.8 5 13 (13)
Visnaga daucoides

25% off

Visnaga daucoides (syn. Ammi visnaga)
From £1.87
approx 300 seeds
Pastels cutting garden collection

25% off

Pastels cutting garden collection
£28.62 £21.46
1 × collection
Cobaea scandens f. alba

25% off

Cobaea scandens f.alba
£3.69 £2.77
approx 15 seeds
0 star 0 star 0.75 star 1 star 1 star 2.8 5 4 (4)
Cosmos bipinnatus Hummingbird Lilac

25% off

Cosmos bipinnatus 'Hummingbird Lilac'
£3.49 £2.62
approx 40 seeds
Ipomoea purpurea Grandpa Otts

25% off

Ipomoea purpurea 'Grandpa Otts'
£2.25 £1.69
approx 30 seeds
0 star 1 star 1 star 1 star 1 star 4.0 5 1 (1)
Nicotiana Whisper Mixed F1

25% off

Nicotiana 'Whisper Mixed' F1
From £2.24
approx 70 seeds
0.75 star 1 star 1 star 1 star 1 star 4.8 5 13 (13)
Nicotiana mutabilis

25% off

Nicotiana mutabilis
£2.79 £2.09
approx 100 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Tagetes patula Burning Embers

25% off

Tagetes patula 'Burning Embers'
£2.39 £1.79
approx 50 seeds
Trifolium repens

25% off

Trifolium repens
£2.79 £2.09
approx 750 seeds
Zinnia Dahlia-Flowered Mixed

25% off

Zinnia 'Dahlia-Flowered Mixed'
£2.99 £2.24
approx 130 seeds
Zinnia elegans Zinderella Lilac

25% off

Zinnia elegans 'Zinderella Lilac'
£4.99 £3.74
approx 20 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 1 (1)
Phacelia tanacetifolia

25% off

Phacelia tanacetifolia - green manure
£2.89 £2.17
25m² pack
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Ajuga reptans

25% off

Ajuga reptans
£2.99 £2.24
approx 50 seeds
1 star 1 star 1 star 1 star 1 star 5.0 5 3 (3)
Dahlia Black Forest Ruby

New

Dahlia 'Black Forest Ruby'
£2.99
approx 50 seeds
Viola Vivaldi Beacon

New

Viola 'Vivaldi Beacon'
£4.99
approx 20 seeds
Lepidium sativum

25% off

Lepidium sativum
£2.99 £2.24
approx 4500 seeds
Ocimum basilicum Thai

25% off

basil 'Thai'
£2.29 £1.72
approx 300 seeds
Symphytum officinale

25% off

comfrey - common
£2.99 £2.24
approx 40 seeds
Ocimum basil Duo mixture

New

25% off

basil 'Duo mixture'
£2.99 £2.24
approx 500 seeds
carrot Chantenay Royal

25% off

carrot 'Chantenay Royal'
£2.29 £1.72
approx 2000 seeds
chilli Basket of Fire F1

25% off

chilli 'Basket of Fire' F1
£3.99 £2.99
approx 10 seeds
chilli Carolina Reaper

25% off

chilli 'Carolina Reaper'
£3.99 £2.99
approx 5 seeds
chilli Jalapeño

25% off

chilli 'Jalapeño'
From £1.87
approx 15 seeds
1 star 1 star 1 star 1 star 1 star (1)
chilli Spangles

25% off

chilli 'Spangles'
£3.49 £2.62
approx 10 seeds
chilli Trinidad Perfume

25% off

chilli 'Trinidad Perfume'
£3.49 £2.62
approx 10 seeds
courgette Gold Rush

25% off

courgette 'Gold Rush' F1
£2.99 £2.24
approx 10 seeds
cress common plain

25% off

cress 'common plain'
£1.99 £1.49
approx 5000 seeds
cucumber Burpless Tasty Green F1

25% off

cucumber 'Burpless Tasty Green' F1
£2.79 £2.09
approx 16 seeds
0.75 star 1 star 1 star 1 star 1 star (4)
cucumber Crystal Lemon

25% off

cucumber 'Crystal Lemon'
£2.49 £1.87
approx 30 seeds
0 star 1 star 1 star 1 star 1 star (3)
Cucumber La Diva

New

25% off

cucumber 'La Diva'
£2.99 £2.24
approx 25 seeds
cucumber Marketmore

25% off

cucumber 'Marketmore'
£2.19 £1.64
approx 50 organic seeds
kale Oldenbor F1

25% off

kale 'Oldenbor' F1
£2.49 £1.87
approx 30 seeds
Luffa cylindrica

25% off

loofah gourd - grow your own sponges
£2.99 £2.24
approx 10 seeds
melon Charentais

25% off

melon 'Charentais'
£2.49 £1.87
approx 8 seeds
melon Honey Drops Dara

New

25% off

melon 'Honey Drops Dara'
£3.99 £2.99
approx 5 seeds
pea Alderman

25% off

pea (maincrop) 'Alderman'
£2.19 £1.64
approx 300 seeds
pumpkin Marina di Chioggia

25% off

pumpkin 'Marina di Chioggia'
£3.49 £2.62
approx 9 seeds
squash Butternut

25% off

squash 'Butternut'
£3.99 £2.99
approx 15 seeds
squash Turks Turban

25% off

squash 'Turks Turban'
£2.49 £1.87
approx 15 seeds
1 star 1 star 1 star 1 star 1 star (1)
tomato Roma VF

25% off

tomato (plum) 'Roma'
£3.29 £2.47
approx 45 seeds
tomato San Marzano

25% off

tomato (plum) 'San Marzano'
£4.49 £3.37
approx 50 seeds
1 star 1 star 1 star 1 star 1 star (2)
Lunaria annua Chedglow
Lunaria annua 'Chedglow'
From £3.74
available to order from summer
0.75 star 1 star 1 star 1 star 1 star (3)
Cobaea scandens
Cobaea scandens
£3.19 £2.39
available to order from autumn
0 star 0 star 1 star 1 star 1 star (1)
chilli Joes Long Cayenne

New

chilli 'Joes Long Cayenne'
£3.99 £2.99
available to order from autumn
1 star 1 star 1 star 1 star 1 star (1)
chilli Padron
chilli 'Padron'
£3.99 £2.99
available to order from autumn
1 star 1 star 1 star 1 star 1 star (1)
tomato Red Cherry
tomato (cherry) 'Red Cherry'
£3.99 £2.99
available to order from autumn

Seeds to sow indoors in May 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.

Seeds to sow indoors in May help you plan your seed trays, pots and outdoor sowing without the guesswork. Use the timing as a simple guide, then check each product page for the best sowing notes before you start.

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.