10%, 20% and 50% flower

July 2, 2015 - Issue 16

To assess flowering stage, count all “flowers” — which includes flowers, aborted flowers and developing pods — on the main stem. These numbers are based on plant densities above 8-10 plants per square foot. A thin stand can have more flowers on the main stem.

Canola at 20% flower. Source: NDSU

Canola at 20% flower. Source: NDSU

At 10% bloom, the main stem will have around 10 “flowers”. It takes 2-4 days to go from first flower to 10% bloom.

At 20% bloom, the main stem will have 15 “flowers”. Canola can reach 20% bloom in 4-5 days after first flower

Petal drop starts after 30% bloom.

50% bloom is when the crop is at its “most yellow.” This is roughly when there are 20 “flowers” on the main stem, and side branches are starting to flower. This stage can last a week or more in crops with lower plant counts that result in higher numbers of secondary branching.

Canola Watch