Coriander Bloom Basics Quiz Quiz

Explore key factors affecting coriander flowering and how to recognize, manage, and benefit from its bloom in horticulture. Perfect for growers, students, and those interested in agricultural plant development.

1. Optimal Conditions for Flowering

   Which environmental factor most strongly triggers coriander (Coriandrum sativum) to start flowering in temperate regions?

   1. Cool night temperatures
   2. Heavy shade
   3. Excessive soil moisture
   4. Increasing day length

   Explanation: Coriander is a long-day plant, so longer daylight hours typically stimulate the transition from vegetative growth to flowering. Excessive soil moisture can lead to disease and does not promote flowering. Heavy shade often delays or prevents flowering, while cool nights slow growth but aren't a primary cue for bloom.

2. Premature Flowering Impact

   When coriander 'bolts,' how does this affect leaf harvest quality and yield?

   1. Leaves grow larger and sweeter
   2. Bolting only affects seed yield
   3. Flowering improves leaf texture
   4. Leaves become smaller and less flavorful

   Explanation: Bolting, or early flowering, causes coriander leaves to become smaller, tougher, and develop a stronger, less desirable flavor for culinary uses. It does not make leaves larger or sweeter, does not improve texture, and affects both leaf and seed yield, not just seeds.

3. Vernalization Role

   What is the effect of vernalization on coriander flowering?

   1. It permanently stops flowering
   2. It delays flowering
   3. It accelerates flowering
   4. It has no effect on coriander

   Explanation: Vernalization is exposure to cool temperatures, which can accelerate flowering in coriander by reducing the time to bolt. It does not stop flowering, and while the effect varies by variety, it generally does not delay or have no effect.

4. Pollination Requirements

   Which statement best describes coriander's pollination process during flowering?

   1. Flowers require wind pollination only
   2. Cross-pollination is essential for seed set
   3. Flowers cannot self-pollinate
   4. Flowers are primarily self-pollinated but also attract insects

   Explanation: Coriander flowers are mainly self-pollinated, though insects like bees can help transfer pollen. Wind plays a minimal role in pollination, cross-pollination increases diversity but is not essential for seed production, and flowers do have the capability to self-pollinate.

5. Managing Flowering

   Which strategy is most effective for delaying flowering and prolonging coriander leaf harvest?

   1. Applying high rates of phosphorus fertilizer
   2. Regularly harvesting leaves and providing cooler temperatures
   3. Planting in full shade
   4. Watering excessively

   Explanation: Harvesting leaves frequently and keeping coriander in cooler conditions can delay flowering, extending the leaf harvest period. Excess watering can cause root problems, high phosphorus does not slow bolting, and shade decreases growth rather than prolonging harvest effectively.