How do you get poinsettias to turn red?

Answer 1

Poinsettias require short days and long nights in order to bloom and for their bracts to turn color. They need total blackness if possible; you don't even want the light from the moon or stars to enter the room where the poinsettias are being kept.

It will take a while but the poinsettias will turn red by doing this.

(http://www.howtodothings.com/home-garden/how-to-make-a-poinsettia-turn-red)

Answer 2

The experience of undergoing 12 hours 20 minutes of uninterrupted darkness each day for five (5) days straight may cause the modified leaves of poinsettias (Euphorbia pulcherrima) to change from green to red.

Specifically, there are other conditions that must be met, such as:

1. Control of sanitation, pests and exposure to such pesticides as weed killers;

2. Correct altitude and latitude;

3. Night temperatures at 60 degrees F;

4. Proper levels of humidity, light intensity; soil aeration, drainage, moisture and nutrition; and temperature.

If the above are met, then the dainty, inconspicuous yellow flower will appear and the bracts will change from green to red according to the following time line:

1. Within 65 days if day temperatures are 60 degrees F/15.6 degrees C;

2. Within 75 days if day temperatures are 70 degrees F/21.1 degrees C;

3. Within 85 days if day temperatures are 80 degrees F/26.7 degrees C.

Answer 3

In order to get a poinsettia plant to turn red, you need to eliminate its light. Flower formation is actually triggered by periods of darkness. During the day, poinsettia plants require as much bright light as possible in order to absorb enough energy for color production.

At night, however, poinsettia plants must not receive any light for at least 12 hours. Therefore, it may be necessary to place plants in a dark closet or cover with cardboard boxes.

Answer 4

No, the regular leaves of poinsettias (Euphorbia pulcherrima) do not change in color from green to red.

Instead, what changes in color are the modified leaves that surround the plant's dainty, inconspicuous yellow flower. These modified leaves are called transitional bracts. They start their lives green. But they become red by the time the plant flowers, typically in December.

Between the transitional bracts and the flower are the true bracts. They live their entire life red and therefore do not need to undergo any color change. Between the true bracts and the always green regular leaves are the color-changing transitional bracts.

Answer 5

put them in a greenhouse make the timing seem like winter and also keep it dark in there for most of the time

Answer 6

to shed their leaves