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Cultivation

Sunflower Plant Density

Helianthus annuus L.

A critical factor in sunflower yield that determines plant access to moisture and nutrients. Optimal seeding density depends on hybrid characteristics, moisture levels, and planned agronomic practices.

In the reference 247 varieties crop Sunflower, where this is mentioned in the description.

Excessive sunflower plant density leads to a decrease in 1000-seed weight, as well as a reduction in head diameter and oil content. Overly high plant density results in plant deformation, "stretching," uneven ripening, an increased risk of disease development, and damage to the crop during harvesting.

The seeding rate varies depending on regional moisture levels: from 35–45 thousand plants per hectare in arid zones to 50–60 thousand plants per hectare in conditions with sufficient moisture or on irrigated plots. When calculating the field rate, an adjustment for field emergence is taken into account, which is usually 10–25% lower than laboratory germination, as well as an 8–10% adjustment needed when planning mechanical harrowing after emergence.

General information about the subject — on the page Planting density.

Sources8

Varieties of Sunflower mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

AS 33-109

Active

Helianthus annuus L. · Sunflower

Frederic Poujeaud

UA
2 records

Hysun 321

Active

Helianthus annuus L. · Sunflower

BG HU
6 records

Insun 277 SU

Active

Helianthus annuus L. · Sunflower

Jean Pierre Dufourcq

IT UA
4 records

RGT Vuellta

Active

Helianthus annuus L. · Sunflower

RAGT 2N S.A.S

IT
3 records

Medusa 

Active

Helianthus annuus L. · Sunflower

MAS SEEDS

IT UA
3 records

Yana

Active

Helianthus annuus L. · Sunflower

Encheva, Stoyanova, Hristov, Nenov, Ivanov, Nikolova, Petrov, Petakov, Velkov, Encheva, Shindrova, Piskov, Tsvetkova, Ivanov

BG
4 records

SY CAPRICIO AR

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection AG

UA
4 records

NS H 26752

Active

Helianthus annuus L. · Sunflower

SINISA JOCIC / SANDRA CVEJIC / DRAGANA MILADINOVIC / BOSKO DEDIC / VLADIMIR MIKLIC

UA
4 records

Kruiz

Active

Helianthus annuus L. · Sunflower

Surovikin Volodymyr Mykolaiovych, Sliusar Emiliia L`vivna, Soldatov Karm Ivanovych, Detsina Oleksandr Oleksandrovych, Ilatovs`kyi Volodymyr Platonovych, Borodin Serhii Heorhiiovych,

UA
4 records

FD15E27

Active

Helianthus annuus L. · Sunflower

PACUREANU JOITA MARIASTANCIU DANILSTANCIU MARIA

RO
4 records

ES Arcadia

Active

Helianthus annuus L. · Sunflower

Euralis Semences

IT
3 records

8H463CL

Active

Helianthus annuus L. · Sunflower

DOW AgroSciences

IT
5 records

P64LE218

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

ES UA
4 records

NS H 6054

Active

Helianthus annuus L. · Sunflower

Miladinovie Dragana, Cvejie Sandra, Jocie Sinisa,

UA
4 records

RGT Axell M

Active

Helianthus annuus L. · Sunflower

RAGT 2n, FR

FR
3 records

Regina CL

Active

Helianthus annuus L. · Sunflower

Rotaru Igor Tudor, Rotaru Vitalie Tudor, Rotaru Tudor Grigore,

UA
4 records

Pr64h10

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

IT
5 records

NS H 498

Active

Helianthus annuus L. · Sunflower

SINISA JOCIC / SANDRA CVEJIC / GORAN MALIDZA / VLADIMIR MIKLIC / NENAD DUSANIC

UA
4 records

MAS 91OL

Terminated

Helianthus annuus L. · Sunflower

MAS SEEDS

IT
3 records

Luka

Active

Helianthus annuus L. · Sunflower

Poljoprivredni Institut Osijek, HR

HR
3 records

Forvard

Active

Helianthus annuus L. · Sunflower

Kryvosheieva Olena Vatslavivna, Shepilov Borys Petrovych, Popova Ol`ha Andriivna, Veselyi Vitalii Oleksandrovych, Kuzmyshena Nadiia Viktorivna, Syvenko Valentyna Ivanivna, Makliak Kateryna Mykolaivna, Alad`ina Zoia Kyrylivna, Kyrychenko Viktor Vasylovych,

UA
5 records

Enigma CLP

Terminated

Helianthus annuus L. · Sunflower

Dobroudja Agricultural Institute - General Toshevo (BG)

BG
3 records

U-55 E

Terminated

Helianthus annuus L. · Sunflower

Frank Jozsef / Hollosi Szilard / Ivan Jozsef / Kiss Zoltan / Nemeth Gizella / Szabo Antal

CZ HU
2 records