Like many of you, I have been using both 5 gallon and mini-SIPs for figs with excellent results. So far I have used a mix consisting of 30% sand, 10% crushed mesquite charcoal, 20% pumice, 20% coconut coir (prewetted), and 20% pine bark fines. However, I tried recently to transplant (by bare rooting) a very healthy cutting with lush root and leaf growth from a mini-SIP to a 1 gallon container with a conventional 5-1-1-1 mix. The one gallon container is not a SIP. The cutting is in extreme transplant shock and may not make it. (Fortunately I have a couple back-ups.) I have transplanted easily from mini-SIPs to 1 gallon SIPS containing the same mix with no obvious transplant shock.
So this has me wondering if figs in SIPs adapt their root system to the constant presence of abundant moisture in the soil and have problems then adjusting to a more conventional environment. This spring I plan to transplant several figs from 5 gallon SIPs to the ground. I haven't decided whether to do this just prior to bud-break or whether to wait a month or so until all threat of hard frost is past. The latter would be safer in terms of the weather but I'm worried that the transplant shock may be worse because they will be leafed out. Has anyone else experienced a lot of transplant shock when transitioning from SIPs to conventional containers or the ground? Any ideas on how to alleviate the transplant shock? Thanks!