Yarrow plant, growingyarrow flowers. Caption. Yarrow can come in a bright yellow variety, but it can also be red or pink. Photo Credit. Alexander Boeckmann. 6 FAQs About GrowingYarrow. #1: How tall does yarrowgrow and what colors are available? Common yarrowgrows 36-inches high and produces white flowers. Optimal Growing Conditions. Yarrow is adaptable, but certain conditions will maximize its growth and bloom potential. Light. Yarrow requires at least 6–8 hours of full sun daily. How To GrowYarrow Plants. Woolly Yarrow Plant Care. What Does Yarrow Look Like. GrowingYarrow From Seed. Remove the plastic wrap once the seeds have sprouted. Regardless of whether your yarrow plants are grown from seed or bought as full plants, you will want to plant them in full sun. How to Propagate Yarrow. Yarrowgrows aggressively and can self-seed if left unchecked.The spreading clumps of common yarrowgrow 1-3 feet tall. Yarrowgrows quickly, so oftentimes the plant requires staking to hold the blooms upright. Place a stick alongside the yarrow plant and tie the plant to the stick with some twine. Growingyarrow is a fantastic way to add colour and vibrancy to your garden. Learn about growingyarrow plants in Australia today with Bunnings Warehouse. Common Names. Yarrow, nosebleed plant, sanguinary, milfoil, soldier's woundwort, thousand-leaf. Botanical Name. Achillea millefolium.You can also growyarrow from seed. For more growing tips and tricks, check out the Growing Guide! White Yarrow Planting Information. Planting Method: direct seed or transplant.