NANANGO State High School outgrew all the competition in this year's annual Sunflower Competition, taking out the overall grand champion and an additional four awards.
The Year 7 to 10 group grew a giant sunflower weighing 3.463kg, which topped a weigh-in at UQ Gatton campus.
Nanango State High School was one of 86 high schools from across Queensland, New South Wales, Western Australia, South Australia and Victoria who participated this year, with 3826 students taking part in the classroom.
Fifteen schools were able to attend The University of Queensland for the annual sunflower competition weigh-in day.
The students have been growing their sunflowers over a 12-week period, aiming to beat the record weight of 4.455kg set by Mueller College in 2014.
Students have grown potted sunflowers at school, experimenting with different soils, light regimes, water applications and fertilisers, and considering environmental factors such as weather and growing conditions in their region and how this affects sunflower growth.
2017 competition results
Overall Grand Champion: Nanango State High School Years 7-10, 3.463kg.
Tallest sunflower prize: St Edmunds College, Ipswich, Group 7-9, 2.56m.
Most ornamental sunflower prize: St Aidan's Anglican Girls School, Year 8.
Encouragement Award 1: Taroom State School, Year 9.
Encouragement Award 2: Genesis Christian College.
Heaviest sunflower: Nanango State High School, 3.463kg.