Yarrow , sometimes known as sun fern for its high light demand and fern - like foliage , is an herbaceous perennial plant appreciate for its redolent , ornamental peak . The Achillea millefolium industrial plant can reach up to 3 infantry in height and modernize flat , heavy clump of flower in spring , summer and fall . Yarrow flowers are most often bloodless , but they can also be yellow , orangish , pink or cherry-red . milfoil plants are fearless in zone 3 through 9 , and demand very little guardianship to thrive in the home garden .
Step 1
Purchase yarrow works in spring or pass from a glasshouse or garden center . They are typically available as started plants in 1- to 6 - gallon containers . opt a planting emplacement that get full sun and has well - drained soil of median fertility .
Step 2
machinate the site by cultivating the land to a depth of 6 inch with a garden tiller . Dig a planting trap of equal depth and double as wide as the plant ’s current grow container . Place the yarrow flora into the hole , back - fill with soil and water thoroughly . Space plants 18 inches apart to grant room for maturation .
Step 3
pee yarrow plants only after the soil has completely dry out , about once per hebdomad during spring and summer . deoxidize the oftenness of watering during fall and winter to once every two weeks , or any sentence the top 2 to 3 inches of soil are dry to the touch .
Step 4
Remove spent yarrow flowers after they have faded to encourage further bloom . Cut back the idle flower clustering with pruning shears or pinch off with your fingers if potential . In some cases , deadheading may result in a 2nd bloom in twilight .
Step 5
wager tall Achillea millefolium cultivar to prevent them from falling over or drooping when they become too tall . Place a bloom post in the ground 1 to 2 inches from the foundation of the plant life and ensure it loosely to the stake with garden twine for the best results .
Tip
Yarrow peak may be cut for heyday arrangements if hope , and this will have the same effect as deadheading . separate milfoil plants once every 2 to 3 years to increase vigor and prevent the plant from becoming too crowded . No auxiliary fertilization of yarrow plants is required . Blooming and length of service may suffer if the plant are feed .
Warning
Do not utilise water to yarrow plants on weeks that have at least 1 inch of born rain . Yarrow can not tolerate soggy soils , and too much water can result in weak plant prostrate to fungal disease .
