Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
εκβλαστήση should sprout LXX.Isa.55.10
εκβλαστήσει shall sprout forth LXX.Num.17.5
εκβλαστήσαι causing to sprout forth LXX.Job.38.27
εκβλαστάνει sprouts forth LXX.Isa.61.11

Liddell-Scott-Jones

ἐκβλαστάνω (ekblastanō) to sprout forth G:V

ἐκβλαστάνω-άνω,

aorist I ἐξεβλάστησα [Refs 5th c.BC+], but infinitive ἐκβλαστάνωεῖν [Refs 4th c.BC+]:—shoot, sprout, [Refs 5th c.BC+]

__2 with accusative, grow out of, τὴν ἰδίην ἰδέην Hp. [prev. cited]
__II cause to grow, produce, ἔξοδον χλοῆς [LXX]; cause to revive, τὴν φυήν [Refs 2nd c.AD+]

LSJ Scripture Refs: LXX.Job.38.27