University of Florida

2008 Whitestar

Growth Regulators Applied / Height graph

Graph shows projected plant heights during production of the crop. Dots are plotted actual height each week. Arrows indicate when PGRs are applied with details in the weekly notes. We use the “late” graphical tracking curve and heights are from bench to height of growing tip. Heights are plotted from date of pinching to projected date of finish.

Growth regulator height control


Whitestar November 25th11/25

These Whitestar have finished on schedule and at a good height. The plants look good. The 2 inches of growth the last 14 days was a little surprising, but welcomed. Elongation from Fascination normally occurs within 5-14 days after application, so we are not sure that all of this late elongation was due to the Fascination. For this cooler fall, the amount of PGR needed early was unexpected, but the crop was never on verge of getting out of control. In hindsight we probably should not have made the Cycocel spray on Oct. 14.

Whitestar November 18th11/18

We were not expecting to see this much growth on this crop, but it has the crop looking much better. The growth is probably a combination of the Fascination and the increase in our day temperature. There is good bract size now and the crop could be shipped. However, the plants will look very good next week.

Whitestar November 11th11/11

The Fascination at 3 ppm applied last week did not have much effect on this crop of Whitestar. They are so close to finish that another Fascination would not cause any additional growth. So we will just wait and see how this crop finishes.

Whitestar November 4th11/04

These Whitestar look good but have stopped elongating. Whitestar is not a vigorous variety, which is one of the reasons we selected it for the 6” crop. We would like to get another inch or so on these plants and are spraying with Fascination at 3 ppm.

Whitestar October 28th10/28

We are not sure why this crop of Whitestar slowed down so much this past week. We will have to see what they do this coming week. The shoots do look like they are elongating again.

Whitestar October 21st10/21

These Whitestar look good and are not growing too much at this point. They are just starting to show signs of color change. We anticipate needing to do a late drench when heights are about 11.5 inches. Hopefully, that will be in 2 weeks.

Whitestar October 14th10/14

This Whitestar crop looks good. We are spraying with Cycocel at 1,250 ppm this week to give a little more control.

Whitestar October 7th10/07

Shoot tips on these Whitestar are “tight” and showing good control from the sprays. We are not spraying this week, but expect to do a Cycocel application next week.

Whitestar September 30th9/30

This crop of 6-inch Whitestar looks good. We want to slow them a little more and are spraying again this week with the low rate of B-Nine/Cycocel tank mix (1,000 ppm of each).

Whitestar September 23rd9/23

Since these are 6” pots, we need to keep the plants under control. We are spraying this week with the low rate of B-Nine/Cycocel tank mix (1,000 ppm of each).

Whitestar September 16th9/16

Since we are in 6” pots we want to keep these Whitestar under control. We are spraying this week with the medium rate of B-Nine/Cycocel tank mix (1,500 B-Nine and 1,250 Cycocel).

Whitestar September 9th9/09

Whitestar is one of the more popular white varieties. We are doing this crop in 6-inch pots and targeting a 12 to 14-inch plant. Whitestar has moderate vigor and should not be difficult to control.