While renjiro was spending his time toying with the grimmon's tar, the others were trying to get the job done as quickly as possible with phoebe trying to fix the damage renjiro had caused to the plant stem and trying to reattach the pathways he had damaged.
At that moment no one was concerned about him or what he was doing, with the help of phineas, phoebe was able to graft the tissues to create a bridge between both pathways and as soon as she was sure the new tissues could hold the energy flow she rushed over to help phoebe work on the damages renjiro had caused, they were able to deal with the damages and ensure that the plants energy was able to flow unhindered before collapsing to the ground in exhaustion.