Bloom
The Bloom spell is learned during the Nature Spirit quest when Filliman Tarlock asks for a silver sickle, which he then blesses.
The blessed sickle, as well as the ivandis flail can be used to cast Bloom on bushes, logs, and twigs in the Mort Myre Swamp to harvest pears, fungi, and stems respectively.
No runes are required for this spell. The spell costs a random value of 1-6 Prayer points to cast, and it cannot be cast at 0 Prayer points. Prayer may be recharged at the Nature Altar in the Nature Grotto where Filliman Tarlock lived.
The components created with the Bloom spell may be used in Herblore or may be added to a Druid pouch, allowing Ghasts to become fully visible and subject to attack.