I think it depends on what you want to do. If you want a super elaborate arrangement and you nor anyone in your group has any experience then it’s probably a bad idea.
If you are going with something a little simpler then I think you would be totally fine.
We made 4 bouquets, boutonnieres for groom, 3 groomsmen and all immediate family. Simple, simple, centerpieces.
Just remember to allot a good chunk of time for it on the day before your wedding.
If you are ordering online I would advise having your flowers arrive on Thursday. Have someone there to sign for them and immediately take them out of the box. Clean them up, prune the ends, put them in fresh water. Purchase some plant food. Regularly spritz them with water. They will need this time to acclimate and open up (most wholesalers ship flowers that aren’t completely opened up). We had simple gerbera daisies and this process took about 2 hours on Thursday.
Putting together everything on Friday took us about 4. Again, we had very simple flowers.
I urge you to NOT depend on someone who said they will help you. The one thing that pushed me to the side of DIY was that someone VERY CLOSE to us offered to help me with all the flowers. Then we find out a month before that she was not coming in for the wedding till Friday afternoon. Big freaking help that was! So myself and my 2 bridesmaid along with my husband and a groomsman ended up working on them.
SO unless YOU feel confident working on them yourself…
If you do decide to do it make sure you allot those hours for them.
I would honestly check around you locally first and see if there is a wholesaler near you. There’s got to be at least one wholesaler around that supplies to the local florist and sells to the public. This way you can see the quality of your stock.
I ordered from a wholesaler in DC that a friend recommended. I was VERY disappointed with the stock. Thank god I ordered a ton extra but ended up throwing out a good quarter of the flowers.
I highly recommend doing a trial run in the weather that you expect your wedding day to be with the flowers you intend to use. To test it out and see how the flowers will take to the weather. Every flower reacts differently to different weather, you want to make sure your bouquet will be standing strong after 36+ hours of being arranged. And that way you can also time out how much time it will take to prep and make the bouquets for the day of.