University of Florida

2011 Jubilee — 1139 Delayed (** Lights out 10/4)

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.

2011 growth chart for Jubilee - 1139 Delayed poinsettia


Jubilee 1139 Delayed 12-612/6

This delayed crop of Jubilee has turned out very nice. Plants are tall, but have good stem strength. The lights out date of 10/4 worked well for scheduling the crop to finish the 1st week of Dec. Pinching on 9/6 gave 4 weeks of vegetative growth which is good for a 17" plant but that could be reduced to 3 to 3.5 weeks for smaller sizes.

Jubilee 1139 Delayed 11-2911/29

The weather the past 2-3 weeks has been warmer than average and this crop has shown the potential to elongate under these conditions. We have applied two drenches at 0.5 ppm. We could apply the drench again this week, but decided not to since the weather should be cooler for the next week. The plants will finish a little over 17". They have good stem strength and the height should not be a problem.

Jubilee 1139 Delayed 11-2211/22

Last week we drenched this crop with 0.5 ppm of Bonzi, which is one-half of our standard rate for a late drench. With the continuation of our warm days we are again drenching with 0.5 ppm this week. This should keep the crop below 17". The plants look like they will be finishing in 7-10 days.

Jubilee 1139 Delayed 11-1511/15

This crop did not slow down like we expected. Since the weather is predicted to continue warm for next several days, we now need to do something to make sure it does not finish too tall. There is enough bract develop to meet the requirement for a late Bonzi drench at the warm climate rate of 1 ppm, which is designed to stop elongation. If the plants were at 16 inches now we would make that application. But at about 15 inches, we probably do not need to be that aggressive with this variety. So, we are drenching with Bonzi at 0.5 ppm now, which can be repeated next week if needed. Objective of this strategy is to reduce the amount of PGR used and have less effect on bract development.

Jubilee 1139 Delayed 11-811/8

Based on the growth pattern of the natural day crop of Jubilee, we expect this crop to slow considerably now and to finish without any additional PGR.

Jubilee 1139 Delayed 11-111/1

First color is beginning to show on this crop now and they should finish on time. The shoot tips show that the plants are elongating at a good rate. We want to slow elongation a little, so we are drenching with Bonzi at 0.1 ppm. We will see how the crop responds, but we may need one more PGR application.

Jubilee 1139 Delayed 10-2510/25

So now we are glad we did not drench again last week. The shoot tips on these plants are not too tight and look like the plants will continue growing.

Jubilee 1139 Delayed 10-1810/18

This group of delayed Jubilee did not respond to the PGR as much as did the natural day crop. We decided to not treat this week to avoid a potential for putting on too much close together. The cooler temperatures should help slow elongation and we will see where heights are next week.

Jubilee 1139 Delayed 10-1110/11

This group of delayed Jubilee is also growing at a strong pace now. We want to slow elongation some to keep the plants compact and looking good. We are applying a Bonzi drench at 0.1 ppm

Jubilee 1139 Delayed 10-410/4

This delayed crop of Jubilee went to short days today. So initiation should be delayed about 7-10 days compared to the natural day crop. This should give us about 10-14 days delay in finish timing.

Jubilee 1139 Delayed 9-279/27

Lights out is next week and we will continue to watch development.

Jubilee 1139 Delayed 9-209/20

Lights out on this crop is Oct. 4 and the plants look fine.

Jubilee 1139 Delayed 9-139/13

No PGRS are needed on this crop.

Jubilee 1139 Delayed 9-69/6

We expect that Jubilee will be a good crop delayed for later market dates. With a lights out date of 10/4, we are anticipating a finish date of 12/6. It will be interesting to see the difference in how this delayed crop develops compared to the natural day Jubilee crop.