Hello Simon, Dave Wilson Nursery came to my mind while reading your post.They have both written and video information available. Brady

So my multi-graft apple finally bloomed this year (and set apples too). The weakest variety however did not bloom and seems destined to fall behind, despite it growing on the south side of the tree. appleconservatory - going just by the zone may be risky; there are large differences in climate in areas that are in the same "climatic zone". Even though Goyo and I are in the same zone, I am in north-central Washington state with cool summers and much longer winters than in Southern California.We happen to be great apple growing territory up here for instance.

Although I don't have a direct answer to your question, here are a couple of suggestions that might help: 1. Be sure you really want what you are asking for. There are many disadvantages to these "fruit cocktail" trees. 2. Check the Fruit and Orchards Forum for... a. more information on the benefits and disadvantages of this type of tree and b. possible sources. 3. Consider mail order sources whether you decide to go with a "fruit cocktail" tree or just a few really good fruit trees. 4. Below is a link to a list of many mail order sources. I'm not sure which ones will have what you are looking for, but it's a place to start. 5. If you do mail-order your tree(s), be sure to check out the source on Garden Watchdog before placing an order. Sources like TyTy, Burgess, and Gurney's are highly likely to result in disappointment. 6. Decide which type of fruit you want on your tree. The fruit cocktail trees usually contain various cultivars of the same type of fruit (apples, for instance) but may, in some cases, contain different, closely related species/types of fruit (for instance, different prunus species). Here is a link that might be useful: Sources for Fruit Trees and Plants

drew- Peaches here ooze (the trunks) like crazy... My thought has always been its due to winter injury. Maybe its cold days like today (4F and sunny) and cold nights... Remember...this area is not for growing peaches (3 out of 5 winters probably drop to -20F or colder). I'm pushing my luck and its why i grow in containers. I still have a few peaches out in the yard (seedlings) but don't expect much out of them. I actually had a peach seedling (nectarine i found out later) make it through a winter here and flower...the fruit was probably a California grown nectarine...i almost wonder if a seedling of Contender or Reliance would be even hardier...who knows. Olpea- You're probably right. I'm sure the differences to a home grower are minimal. On a commercial scale i'm sure a few more pounds per tree can make a lot of difference. I just thought i'd mention it because i've come across it a few times when researching rootstocks. I personally would lean towards Citation over the others in a colder climate. I have Krmysk coming from Raintree and plan on giving that a shot with some multigrafted fruit trees. The problem with Citation is that is not available! I plan on trying Krymsk or a plum seedling of some