Seedling

A seedling is a young plant in the first few weeks after germination. It is first recognizable by the two round cotyledons, which still originate from the seed. Shortly thereafter, it forms the first pair of "true" leaves with the typical serrated shape. The seedling is small, delicate, and sensitive to too much water, too much fertilizer, or too bright light.

Characteristics of a Seedling

The seedling phase generally lasts two to three weeks. During this time, seemingly little happens above ground – the real progress is below the surface, where the plant develops its root system. A healthy seedling stands upright, has lush green leaves, and a short, strong stem. A long, thin stem that can barely support itself, on the other hand, usually indicates too little or too distant light.

Care in the Seedling Phase

Seedlings need little, but it must be correctly dosed. The substrate should be slightly moist, never soaked – young roots tolerate waterlogging poorly. Fertilizer is usually superfluous at this stage and quickly becomes too much. A mild but sufficient light source and moderate humidity are important. Drafts and strong temperature fluctuations are very unfavorable for a seedling.

If the plant survives this vulnerable period, it transitions into the more robust Vegetative Phase.

Frequently Asked Questions about Seedlings

How long does the seedling phase last?

Usually two to three weeks, until the plant has formed several true leaf pairs and transitions into the growth phase.

Why is my seedling long and thin?

This is called "stretching" or "legginess." The cause is almost always light that is too weak or too far away – the plant stretches towards it.

How often should a seedling be watered?

Less often than many think. It's better to keep it lightly and evenly moist than to water daily. Too much water is the most common mistake.