Very good Carol!
Having a degree on Hort helps with these issues... One of the most important things I learned in 'Post Harvest Phys.' was that the flowers (Roses, etc...) NEED to get water up the stems to the flower head ASAP. As we know, keeping Roses at approx 38 deg. F will slow the respiration down as to reduce their opening. However, I am one of those who believe that a fresh cut, hydrating and then in a WARM floral solution is needed FOLLOWED BY a period of hardening off in room temp. For Roses, about 30 min. should do. Then it's IN THE COOLER. This allows time for the water to get up the stem to the rose head and reduces the chance of bent neck.
Of course the variety of the Rose you're dealing with can determin the hardening off period, as well as the hydrated state of the Rose when it arrives to your door. For example, 'Blue Birds' and some 'Versilia' will need a much shorter time in room temp than say your 'Freedoms' of 'Sweet Uniques'. You want those 'Blue Birds' to get hydrated, but at the same time control how "open" they are....
With regards to the sleeves - TOTAL agreement with Carol. - Remove 'em. Botrytis is a big problem with some varieites (Osiana for one...that variety has become VERY problematic with Bot.) Also, keeping the sleeves on to reduce the rate in which the Rose opens is not valid. A Rose will age in or out of a sleeve, and if held in a sleeve too long, will actually "blow" open after a few hours in room temp. Also, remember our old friend Ethylene....ya' need that good air circulation!
- H.
PS - for the record, we are edu-ma-cating our customers to actually LOOK for open roses, and avoid the bullet tight ones....I see from some of the W/S & OG's (800 flowers) they are showing thier roses in a 'more open' state....as oppsed to super-tight....
Oh, and Charlottes from Elite Farms is our Red Rose (with a Ecuador 'Freedom' as the back up...)