Whole red Jupiter tomatoes and one cut in half showing its flesh, with a small pile of seeds in front

Jupiter tomato plant laden with red fruits and one orange tomato ripening, in the vegetable garden

Five red Jupiter tomatoes on a light wooden board with a few leaves, two halves showing the flesh

Red Tomato Seeds "Jupiter"

Name: Red Tomato Seeds "Jupiter"
Brand: Kokopelli
SKU: P6274
Price: 5.0 USD
Availability: InStock

$5.00

A French mid-season tomato, Jupiter produces clusters of round, slightly flattened fruits all summer, red and fleshy, weighing 80 to 230 g, which suit sauces and preserves alike.

The packet contains 35 organic, open-pollinated seeds. Sow from February to April under cover, 5 weeks before planting out after the last frosts.

Ref. P6274·Vegetable seeds

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The summary

What you receive: a packet of 35 organic, open-pollinated seeds of Jupiter tomato.
The fruit: round, slightly flattened, red, 80 to 230 g, beefsteak type.
Sowing: from February to April under cover, at 16 to 20 °C, 5 weeks before planting out.
Spacing: one plant at least every 50 cm, on a stem of 1.80 to 2.20 m to be trained.
In aquaponics: a deep media bed, on a system that has been running for 2 to 3 months.
How to choose: this one for sauce and preserving, the cherry tomatoes for nibbles.

French mid-season tomato, beefsteak type, 35 heirloom seeds

The Jupiter red tomato seeds from the Kokopelli association are a French mid-season variety of the beefsteak type, with round, slightly flattened fruits weighing 80 to 230 g. Their meaty flesh is well suited to sauces and preserves. The packet contains 35 organic, open-pollinated seeds, to be sown from February to April under cover.

Jupiter is a French mid-season tomato of the beefsteak type: its round, slightly flattened fruits weigh 80 to 230 g, and the flesh is meaty. The plant bears abundant trusses throughout the summer, and you will be picking red tomatoes until October. The packet contains 35 organic, open-pollinated seeds.

🍲 A fleshy tomato, in trusses

This variety was entrusted to the Kokopelli association by Daniel André, a French tomato collector, and it has been passed on ever since as a farmers' seed. Its meaty flesh lends itself to long cooking, so Jupiter finds its place in sauces and preserves, while its medium-sized fruits are also eaten sliced. Paired with Yellow Belgium, it makes a two-colour dish on your plate, and the comparison of the four tomatoes places it against the two cherry varieties.

In a nursery

Sow in small pots at 16 to 20 °C, in a bright shelter. Germination takes 6 to 10 days.

At transplanting

After 5 weeks, plant out the whole root ball, with the stem buried up to the first leaves.

In season

Check once a week to tie in the stem and remove the side shoots.

Its growth is indeterminate: the stem keeps lengthening until the first frosts and the plant reaches 1.80 to 2.20 m, so it needs a sturdy stake or a length of training string. Leave at least 50 cm between two plants, and mulch the soil to keep it cool and limit soil splashing onto the lower foliage, which is often where disease gets in. The variety likes full sun and a well-drained, rich, warm soil, with moderate water needs. You will find other varieties to sow at the same time among our vegetable seeds.

🌿 Jupiter in aquaponics

A deep tub for a 2 m plant

A fruiting plant of this size consumes far more than a lettuce: set it up on your system once it has been running for at least 2 to 3 months. The 80 L aquaponic grow bed is the format intended for tomatoes, whose roots seek depth. Filled with clay pebbles, it anchors a 2 m stem and lets the fish water circulate around the roots. An adult plant takes up 0.4 to 0.5 m² of grow bed, and 2 or 3 well-fed plants per 1 m² yield better than 6 crowded ones.

The stake goes in on the day of transplanting

A stake driven in several weeks after planting cuts through roots that are already established and holds the plant back in mid-flowering: so put it in at the same time as the root ball, a few centimetres from the stem. Sowing calls for the same foresight, in the other direction. Sown in January behind an ordinary window, the seedling lacks light, becomes leggy and recovers poorly, as the guide on germination failures explains.

🐝 Fruit set and harvest

Under your greenhouse or in a closed tunnel, neither wind nor insects shake the flowers, and some of the trusses drop without setting fruit. Vibrate the flower stem around midday, with a flick of the finger or with the back of an electric toothbrush held against the stalk for 2 seconds, and ventilate from late morning, because above 70% humidity the pollen sticks and fruit set fails. Nights below 13 °C also slow it down markedly. The first tomatoes ripen 50 to 70 days after planting, a little longer for large fruit; pick them when fully coloured, preferably in the morning, and check often, as the guide to growing tomatoes in aquaponics explains in detail.

Technical specifications

The sachet

Capacity: 35 seedsEnough to plant around ten specimens, including germination losses.
Seed origin: Kokopelli associationOrganic seeds, royalty-free.
Seed type: Open-pollinated, non-hybridReproducible: seed from your own harvest will give the same variety.
Seed storage: About 4 yearsStore in a dry, cool, dark place.

The variety

Botanical name: Solanum lycopersicum
Fruit type: Beefsteak type, round and flattenedFleshy flesh that stands up well to long cooking.
Fruit weight: 80 to 230 g
Colour at maturity: Red
Growth: IndeterminateStem of 1.80 to 2.20 m, to be trained as soon as it is planted out.
Variety origin: FranceMid-season variety.

Seedling and harvest

Seedlings under cover: February to AprilIn a small pot, under a well-lit shelter.
Germination temperature: 16 to 20 °C
Germination time: 6 to 10 days
Time in the nursery: 5 weeks
Installation: After the last frostsWhole root ball, stem buried up to the first leaves, at least 50 cm between plants.
Harvest period: July to October

To budget for separately

Stake or string: Training support fitted at transplanting
Growing medium: Clay pebbles or coir

10 further specifications are available in the detailed view.

In the box

1 packet of 35 Jupiter tomato seeds, from organic farming

Pack size, fruit, height, origin and sowing: data sheet from the seed supplier Kokopelli (ref. P6274), taken on 11/10/2026. Germination time, harvest period and storage are guidelines for mainland France.

Manufacturer and product safety

Manufacturer: Association Kokopelli (SIREN 433481124, TVA FR80433481124)
Postal address: 7 route de Sabarat, Forêt de Castagnès, 09290 Le Mas-d'Azil, France
Contact: Formulaire de contact : https://kokopelli-semences.fr/fr/faq/ (aucune adresse e-mail publique) ; téléphone 05 61 67 69 87
Website: kokopelli-semences.fr

Information provided under Regulation (EU) 2023/988 on general product safety.

Compare the four varieties

Four farmhouse tomatoes, in the same packet format. What changes is the size of the fruit, its colour and what you will do with it in the kitchen.

Four heirloom tomatoes, four uses in the kitchen A meaty cooking tomato isn't grown like a cluster of cherry tomatoes. Start from the plate, and the growing follows.

	Recommended Red Tomato Seeds "Jupiter"Your choice	Yellow Belgium Tomato SeedsYour choice	Grappoli Corbarino Cherry Tomato SeedsYour choice	Yellow Plum Cherry Tomato SeedsYour choice
The fruit
Size	Medium to large, 80 to 230 g	Large, 150 to 300 g	Cherry type, in clusters of 7 to 10	Cherry, 20 to 30 g
Colour at maturity	Red	Orange-yellow	Dark red	Lemon yellow
Shape	Round, slightly flattened	Round	As a plum	As a plum
Best use	Sauces and preserves	Slices and carpaccios	Drying and jarring	Nibbles and salads
The growing
Earliness	Mid-season	Mid-season	Early	Mid-season
Growth	Indeterminate	Indeterminate	Indeterminate	Indeterminate
Variety origin	France	United States	Italy	United States
The sachet
Seeds per packet	35	35	35	35
Open-pollinated seeds	Yes	Yes	Yes	Yes

Red Tomato Seeds "Jupiter"Recommended

The fruit

SizeMedium to large, 80 to 230 g

Colour at maturityRed

ShapeRound, slightly flattened

Best useSauces and preserves

The growing

EarlinessMid-season

GrowthIndeterminate

Variety originFrance

The sachet

Seeds per packet35

Open-pollinated seedsYes

Yellow Belgium Tomato Seeds

The fruit

SizeLarge, 150 to 300 g

Colour at maturityOrange-yellow

ShapeRound

Best useSlices and carpaccios

The growing

EarlinessMid-season

GrowthIndeterminate

Variety originUnited States

The sachet

Seeds per packet35

Open-pollinated seedsYes

Grappoli Corbarino Cherry Tomato Seeds

The fruit

SizeCherry type, in clusters of 7 to 10

Colour at maturityDark red

ShapeAs a plum

Best useDrying and jarring

The growing

EarlinessEarly

GrowthIndeterminate

Variety originItaly

The sachet

Seeds per packet35

Open-pollinated seedsYes

Yellow Plum Cherry Tomato Seeds

The fruit

SizeCherry, 20 to 30 g

Colour at maturityLemon yellow

ShapeAs a plum

Best useNibbles and salads

The growing

EarlinessMid-season

GrowthIndeterminate

Variety originUnited States

The sachet

Seeds per packet35

Open-pollinated seedsYes

Size, colour, shape, earliness and seed count: data sheets from the seed company Kokopelli, recorded on 11/10/2026.

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delivery time

A packet of seeds ships as a small parcel. It can be grouped at no extra cost with the rest of your order, and the exact amount is calculated at checkout.

Frequently asked questions

6 questions

6 key questions

What is a beefsteak-type tomato?

How do you look after a Jupiter plant, week after week?

Can I harvest my own Jupiter seeds?

How much space should you allow for one plant?

Where	Guideline	What you need to know
Open ground	50 cm	At least between two plants, along the row
Grow bed	0.4 to 0.5 m²	Per adult plant, in aquaponics
Trained upwards	1.80 to 2.20 m	A stake or a string up to the top

How much feed do the fish need to be given to nourish a tomato plant?

Can you sow Jupiter directly in its final position?

Growing calendar

Reference points for mainland France, to be shifted by approximately two weeks depending on your region.

Stage
Seedlings under cover3 months	Seedlings under cover: no	Seedlings under cover in February	Seedlings under cover in March	Seedlings under cover in April	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no	Seedlings under cover: no
Transplanting2 months	Transplanting: no	Transplanting: no	Transplanting: no	Transplanting: no	Transplanting in May	Transplanting in June	Transplanting: no	Transplanting: no	Transplanting: no	Transplanting: no	Transplanting: no	Transplanting: no
Training and pruning4 months	Training and pruning: no	Training and pruning: no	Training and pruning: no	Training and pruning: no	Training and pruning: no	Training and pruning in June	Training and pruning in July	Training and pruning in August	Training and pruning in September	Training and pruning: no	Training and pruning: no	Training and pruning: no
Harvest4 months	Harvest: no	Harvest: no	Harvest: no	Harvest: no	Harvest: no	Harvest: no	Harvest in July	Harvest in August	Harvest in September	Harvest in October	Harvest: no	Harvest: no

KeySeedlings under coverTransplantingTraining and pruningHarvest

This month November

Growing guidance

Seedling depth: 0.5 to 1 cmCover lightly, then firm down
Germination temperature: 16 to 20 °C
Germination time: 6 to 10 days
Nursery time: 5 weeksFrom sowing to planting out
Spacing: At least 50 cmBetween two plants, along the row
Fruit weight: 80 to 230 gRound, slightly flattened, fleshy
Plant height: 1.80 to 2.20 mIndeterminate growth
System maturity: 2 to 3 monthsBefore setting up a fruiting plant in aquaponics
pH in aquaponics: 6.4 to 7A compromise between fish, bacteria and plants
Seed storage: About 4 yearsDry and away from light

What you need to know

Put the stake in on the day of transplanting. Driven in several weeks later, it cuts through the established root system and holds the plant back in the middle of fruit set.
Bury the plant up to its first leaves. The buried stem sends out new roots along its whole length and gives a noticeably better-anchored plant for the rest of the season.
Remove any leaves that touch the ground. Soil splashes on the lower foliage are the usual way in for fungal diseases, and a mulch limits them.
In a greenhouse or indoors, the flower does not set fruit on its own: there is no wind and no bumblebee. Vibrating the flower stem daily with a fingertip is enough to turn the blossom into fruit.
Top the main stem towards the end of August, above the last truss that has set. The plant then stops investing in shoots that will not have time to produce.
In aquaponics, do not put a tomato in a system that has been running for less than 2 to 3 months. A fruiting plant consumes far more than a lettuce, and it yellows as long as the system does not supply enough.

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Red Tomato Seeds "Jupiter"

The summary