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agronom.cc cultivar database

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.

SY Futura AR

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG., Basel CH

AT HU RO UA
9 records

P64LL187

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION US

AT FR RO UA
11 records

Monrovia CS

Active

Helianthus annuus L. · Sunflower

Philippe Moreau

FR IT PT UA
7 records

KWS Flexes CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE, DE

RO SI SK UA
8 records

Hysun 298

Active

Helianthus annuus L. · Sunflower

Roberto Reid

IT PT RO UA
8 records

SY Theos

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection,CH

IT SK UA
10 records

SY Barbati

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

IT PT UA
7 records

P64ll164

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Corporation, USA

RO SK UA
10 records

P64LL264

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION US

FR RO UA
9 records

P64LE162

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Corporation, USA

HU RO UA
12 records

P64le163

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Corporation, USA

RO SK UA
11 records

Acordis CLP

Active

Helianthus annuus L. · Sunflower

Olivier Soulie

BG HU UA
8 records

R1119JI

Active

Helianthus annuus L. · Sunflower

SOLTIS S.A.S

BG UA
6 records

Meteor CL

Active

Helianthus annuus L. · Sunflower

May Agro Seed Corporation (TR)

BG UA
7 records

LG50529 SX

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG FR IT SK UA
8 records

Lympil

Active

Helianthus annuus L. · Sunflower

Soper, John

FR HU IT SK
11 records

LG50530 CLP

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN EUROPE S.A.

BG IT SK UA
7 records

N4L215 E

Active

Helianthus annuus L. · Sunflower

NuSeed Americas

FR IT SK UA
8 records

Sunaris

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection AG

ES IT RO UA
9 records

LG50459 SX

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN EUROPE S.A.

BG IT SK UA
7 records

Larisol

Active

Helianthus annuus L. · Sunflower

Semences Cargill SA (FR)

AT FR HU RO
9 records

ES Ellenis

Active

Helianthus annuus L. · Sunflower

LIDEA FRANCE SAS

BG IT SK UA
7 records

LG58390

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG ES UA
8 records

Rio

Active

Helianthus annuus L. · Sunflower

Tovarystvo z obmezhenoiu vidpovidalnistiu "NAUKOVO-VYROBNYChE PIDPRYIEMSTVO "UKRAHROSELEKT"

FR SK UA
8 records