Answer: I think liquid fertilizer is fine and if you've always used liquid fertilizer when transplanting, I don't see any reason to change. The caution against fertilizing a newly transplanted tree or shrub is that fertilizer promotes growth at a time that is usually stressful. You want a newly transplanted tree or shrub to establish a good root system before active top growth takes place. Between the stress of adjustment to a new site, and the encouragement to develop new growth, a tree or shrub can become overwhelmed and not establish or grow at all. That's the reason behind the caution, and it pertains to granular fertilizer, not diluted liquid fertilizer. Hope this clarifies things!
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