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  • Organic seeds for growers' success

    Welcome to De Bolster – organic seeds for professional growers and home gardens. Discover a wide range of varieties.

  • Organic seeds for growers' success

    Welcome to De Bolster – organic seeds for professional growers and home gardens. Discover a wide range of varieties.

  • Organic seeds for growers' success

    Welcome to De Bolster – organic seeds for professional growers and home gardens. Discover a wide range of varieties.

  • Organic seeds for growers' success

    Welcome to De Bolster – organic seeds for professional growers and home gardens. Discover a wide range of varieties.

  • Organic seeds for growers' success

    Welcome to De Bolster – organic seeds for professional growers and home gardens. Discover a wide range of varieties.
From our own production – freshly in stock
100% organic, GMO-free
High-quality seeds with excellent germination
Specialist in Cucurbita breeding

Our winter squash varieties are developed for organic cultivation. The bush types are particularly productive and allow for longer mechanical weed control. Browse our organic squash varieties to discover all benefits.

PRO Pompoen 'Amoro F1' - Cucurbita maxima

Winter Squash 'Amoro F1'

NEW! Pompoen 'Caldor F1' – Cucurbita maxima

Winter Squash 'Caldor F1'

PRO Pompoen 'Fictor' – Cucurbita maxima

Winter Squash 'Fictor'

NEW! Pompoen 'Meteor F1' – Cucurbita maxima

Winter Squash 'Meteor F1'

PRO Pompoen 'Leckør F1' – Cucurbita maxima

Winter squash ‘Leckør F1’

Klimcourgette ‘Ola Escaladora’ - Cucurbita pepo

Climbing Zucchini 'Ola Escaladora'

PRO 1355 Courgette 'Ola Gabriella F1'

Zucchini 'Ola Gabriella F1'

Bolcourgette 'Ola Redonda' – Cucurbita pepo

Round Zucchini 'Ola Redonda'


Exclusive organic varieties

Our varieties perform very well when grown in soil, even under low fertiliser conditions. We offer a wide range of Tomato and Pepper varieties for organic cultivation.

PRO Cherrytomaat 'Bartelly F1' – Solanum lycopersicum

Cherry Tomato 'Bartelly F1'

PRO Tomaat 'Bolstar Gimli F1' – Solanum lycopersicum

Round Tomato 'Bolstar Gimli F1'

PRO Snacktomaat 'Ormato' – Solanum lycopersicum

Snack Tomato 'Ormato'

PRO Pruimtomaat 'Bolstar Sensatica F1' – Solanum lycopersicum

Plum Tomato 'Bolstar Sensatica F1'

PRO Blokpaprika 'Olly F1'

Blocky Pepper 'Olly F1'

PRO Zoetpuntpaprika 'Kyra'

Pointed sweet pepper 'Kyra'

PRO Snackpaprika 'Arwen'

Snack pepper 'Arwen'

PRO Peper 'Koh Chang'

Hot pepper 'Koh Chang'


Home garden favourites

De Bolster supports seed companies worldwide with organic seeds. We produce more than 300 varieties of vegetables, herbs and flowers, all certified organic and GMO-free.

PRO Snijbiet 'Fireworks' - Beta vulgaris subsp. cicla

Chard 'Fireworks'

PRO Tübingermengsel - 6130

Tübingen Flowers, mixture

Coeur de Boeuf

Beefsteak tomato 'Coeur de Boeuf'

PRO Tuinboon 'Eleonora' – Vicia faba

Broad Bean 'Eleonora'

PRO Snack-komkommer 'Kaikura F1' – Cucumis sativus

Snack Cucumber 'Kaikura F1'

Winterwortel Flakkeese 2

Carrot 'Autumn King 2'

PRO Rucola 'Esmee' – Eruca sativa

Rocket 'Esmee'

Tropaeolum majus

Garden Nasturtium, non-trailing

Radijs 'French Breakfast 2' – Raphanus sativus

Radish 'French Breakfast 2'

Goudsbloem – Calendula officinalis

Pot Marigold

PRO Stokslaboon 'Cobra'

Climbing French Bean 'Cobra'

PRO 1630 Pastinaak 'Tender and True'

Parsnip 'Tender and True'