How Long Does It Take for a Flower to Sprout?

Zinnias sprout quickly in warm weather.

Flowers propagate by producing bulbs, sending out runners to produce new plants and, of course, sprouting from seed. How long the seed takes to sprout depends on several factors. Some can be controlled; others can't.

Genetics

Some flowers, such as zinnias, sprout in a few days, given lots of moisture and warm weather. Others, like sweet peas, take several weeks. It's possible to slightly increase or decrease germination rates, but not too far outside their predetermined genetic rate.

Temperature

In most cases, the warmer the soil, the faster the seed will germinate -- but not always. Some flowers like lupine need several weeks of cold and then a warm spell to germinate.

Moisture

Seeds need moisture to saturate the outer shell so the seedling can break through. Soaking seeds in water for 24 hours usually speeds germination. Soak large seeds such as nasturtiums in a bowl of water. Put small seeds such as moss roses on a paper towel and soak the paper towel.

Light

A few flowers, such as Shasta daisies, need light to germinate. Sprinkle these on the surface of the soil and don't cover.

References

• Seeds of Change: Termination Techniques
• "The Country Garden"; Charlie Ryrie; 2003