This is tall and spindly growth, not usual to the growth habit of the plant. It is seen because of the lack of light.

when a plant, usually through age or lack of light, has become spindly and drawn.

Weak, tall growth on a plant, sometimes caused by keeping a plant in too warm conditions too long.

(of plants) having tall spindly stems

Used to describe plants, especially seedlings, which have become unnaturally thin and stretched owing to their being grown in low light conditions.

Refers to plants that have an abnormal amount of stem in relation to their flower and foliage.

Abnormally tall, with sparse foliage: Leggyness of a plant is usually caused by lack of light.