Macro's

The macro's below work on the intended target when your mouse hovers an ally. If you're not hovering anyone, or an enemy, it will cast the spell normally.

Note that I've added to pop trinkets at both the Regrowth and NS+HT macro. My trinkets increase direct healing done on the target, so it would be good to pop these prior to a casted direct heal.

Lifebloom macro

#showtooltip Lifebloom
/cast [target=mouseover,exists,help]Lifebloom;Lifebloom

Rejuvenation macro

#showtooltip Rejuvenation
/cast [target=mouseover,exists,help]Rejuvenation;Rejuvenation

Regrowth and trinkets macro

#showtooltip Regrowth
/use [combat] 13
/use [combat] 14
/script UIErrorsFrame:Clear()
/cast [target=mouseover,exists,help]Regrowth;Regrowth

Wild Growth macro

#showtooltip Wild Growth
/cast [target=mouseover,exists,help]Wild Growth;Wild Growth

Nature's Swiftness, trinkets and Healing Touch macro

/stopcasting
/use [combat] 13
/use [combat] 14
/script UIErrorsFrame:Clear()
/cast [target=mouseover,exists,help]Nature's Swiftness;Nature's Swiftness
/cast [target=mouseover,exists,help]Healing Touch;Healing Touch