Deadhead to lateral buds, then after lateral buds finish blooming, cut stems down to basal foliage. Young plants usually repeat bloom for a long period with deadheading. Flowers may be smaller in the second bloom phase. Cutting back plants by one half or so before flowering in early June, or when about 20cm can produce shorter, stockier plants that are self supporting early in the season.
Common name: Monkshood. Deadhead to lateral buds for a smaller second flowering. When secondary flowering is finished, cut down to new basal foliage if the old foliage declines and fertilise if plants are pale. Prefers a rich, high organic, moist soil. Wont tolerate tree root competition. Divisions can be done in early spring or autumn, but plants are slow to establish so best left undisturbed for many years.
These plants like moist, fertile, organnically rich soil in partial shade. If grown in sun they need much more moisture and the dark coloured foliage types will burn in hot sun. Division can be done in Spring Plants take about three years to reach maturity.
They like full sun and rich, moist, well drained soil. They detest dry sand. In general the largest flowered and broadest leaved Agapanthus tend to be more tender and should be grown in containers so they can be brought in for the winter. The smaller flowered with narrow leaves tend to be more hardy. Agapanthus in pots should be repotted each year in April to a larger pot. Agapanthus may be split in early April When dividing Agapanthus it is advisable to divide into a few large multicrowned chunks. If cut into too small a piece they will take a long time to recover and flower again. May, June and July feed weekly with tomato fertiliser every two weeks.
Easy to grow hardy, low maintenance plant. tolerates both dry and wet soils for short perids, but generally prefers evenly moist conditions. Division is easy in late spring or autumn, but is not necessary for 6-10 years or longer. May require staking if grown in deep shade.
Can grow to 2m. Height can be controlled if thinned and pinched or cut back. Division is every 3-4 years. A long lived plant.
Grow best in moisture retentive soil. Will take full sun but prefer some shade. Tolerate tree root compeition if soils are high in moisture. Division is only required every 10 years or more and is recommended in the spring.
ASTER x frikartii
The new flower buds are borne close to the old flowers, so if you choose to deadhead you must take care to remove each individual deadhead without damaging the new bud. Plants can be lanky, cutting back by one half or more in late May or early June (The Chelsea Chop) can improve the habit.
Deadheading can prolong blooming into September. Deadhead to lateral flower buds, when secondary bloom finishes cut down flowering stems to basal foliage. Yellowing of the foliage may occur in summer, particularly in dry conditions, deadleaf back to new growth at base of plant. Prefers moist, shady, high organic matter conditions. Can grow in sun if kept constantly moist. Division in spring or autumn every 4-5 years.
Although slow to establish Baptisia is a tough plant, drought tolerant, and low maintenance once it takes off. Will take low fertility soils very well. Will not usually require division for 10 years or more.
Most do well in full sun but will also thrive in light shade. Apply a layer of compost each spring. Deadhead plants regulary to prolong flowering. Division can be done every 3-5 years to keep them in vigorous healthy growth.
These plants like full sun to part shade. Deadhead to lateral flower buds if present if not cut off old flowering spikes at a lateral leaf. After all secondary flowering is completed and the old stems start to decline, cut back to newly developed basal foliage. Plants will benefit from a top dressing of compost and fertilising with a quick release soluble fertiliser at the same time. When the young shoots are 15cm tall thin by approximately one third, leaving at least 3-5 healthy stems per mature clump. Do not plant too deep. Will require staking. Heavy feeders so may need additional fertiliser in spring or summer.
Like full sun. These plants seems to have a long bloom period even without deadheading, although deadheading makes the new flowers more prominent and keeps the plant looking fresh. Plants can be cut by one half in early June or when they are about 30cm tall. They will start to flower 2-3 weeks later than usual depending on the weather and will bloom for 2-3 weeks longer than unpruned plants, keeping them in bloom until September and even into October. Avoid high fertility soil which can lead to leggy plants that require staking.
Sea Holly. Individual flowers are ornamental for a long period of time and deadheading doesnt seem to prolong bloom. However we have found that cutting to the ground after flowering will produce wonderful new foliage and often a second flush of smaller flowers. Does require very well drained soil, in fact thrives in dry, sandy soil. Tolerant of neglect during dry summers.
Joe Pye Weed. You can pinch plants in early June when they are about 90cm, this causes five breaks to emerge from the one pinched stem, creating full plants with slightly smaller flowers. The plants heigh is normally not reduced by this pruning. They prefer moist locations, but once established plants are tough and tolerate short periods of drought. Division can be done in spring but only if needed or they get too big for the stop you give them.
Plants can be sheared back by one third and shaped after flowering. Produces a sticky milky sap that can cause skin irritations in some individuals. It is best to wear latex gloves when pruning these plants. Plants can be left for the winter and cut back in early Spring. Requires well drained soil and will tolerate drought. Resent transplanting.
Rebloom is minimal with deadheading. If foliage declines in late summer, cut the plants to the ground for a low fresh mound of leaves. Be certain to keep moist to encourage regrowth. Best in moist, high organic soil. Tolerant of light shade.
Gaura can be cut back before flowering for a nice effect to reduce the height of the plants and to provide fuller clumps with more flowering branches. Good drainage is the primary requirement of thhis long flowering perennial.
The best way of keeping your Geraniums looking good all summer and into autumn is to continually deadhead. In some cases they can be sheared back hard to promote new foliage growth and more flowers. Most prefer well drained soil.
Deadhead to lateral flowers, then when all flowering on the spike is finished cut down to the foliage. Plants can often remain semi evergreen into the winter.
Plants require sufficient moisture during the summer for best performance. Frequest division, say every 3-4 years, is neede to maintain vigour, this should be done in Spring as Helenium resent being divided in autumn. Deadhead regularly to prolong flowering.
Each flowerhead can be snapped off as it fades, and be sure to get the entire flower and not just the petals, or the ovary will be left behind to develop into a seedhead. Deadheading is imperative for the repeat flowering Hemerocallis. Divide them every 3/4 years.
Germanica - Deadhead individual flowers. When all the flowering has finished cut flower stalks down to the foliage usually at an angle away from the rhizome. They prefer well drained soil and full sun. Do not let the rhizome become over congested as it will shade the sun from falling on the rhizome and thereby reducing flowering next year. The rhizome should always be planted above the ground.
Sibirica: Cut off the seed heads when the flowers are finished as they can reduce flowering the following year. They will tolerate partial shade but will flop if given too much.
Ensata: These Iris thrive in heavy, clay soils and love having wet feet. They will grow in full sun to part shade. Huge flowers are produced in July mostly.
If earlier blooming forms are deadheaded, sporadic rebloom may occur later in the season. The foliage may decline after flowering, if necessary cut back to one half to improve the appearance. Do not cut foliage bck for the winter. Cut back in spring when all threat of frost is over.
Cut or shear all foliage and flowering stems back to fresh basal leaves to refresh the overall appearance. The new growth that develops remains attractive through the winter.
Deadhead to prolong bloom particularly in the plants first year. Deadhead to lateral flower buds and after all flowering from lateral buds is finished and new basal growth is developing, cut plants back down to basal growth. By cutting the plants down in early September or before vegetative growth is stimulated and plants can form buds for next years shoots.
Plants should be deadheaded or sheared to the ground after flowring. This encourages lush low plants behind which tall later blooming perennials can be planted. Keep plants moist after pruning and some reblooming may occur. Excellent plants for wet soils.
Deadhead to prolong blooming. Cutting back once or twice before flowering encourages more compact growth and delayed flowering. Plants cut back by one half in early May, when approximately 25cm tall flower about 2 weeks later than unprunted plants. Divide every 2-3 years to control spread and to keep plants strong. Division also prevents a hole from developing in the centre of the clump.
If sheared back by about two thirds after floweriing plants stay more compact and the new growth holds the strong grey-green colour longer. Often rebloomming will occur. Division, if required, can be done in the spring.
Cut back old foliage and flowering stems to the ground immediately after flowering to encourage new but smaller growth that remains to fill the space throughout the summer. Keep plants moist after cutting back. Plant or divide in August or September.
Foxglove Penstemons - P. digitalis - should be deadheaded to a lateral leaf after flowering and then cut down to new basal growth as old stems decline. Somewhat tolerant of wet conditions.
Paniculata - Deadheading prolongs bloom on plants. Thinning Phlox by one third is often recommended to reduce the incidence of mildew. Plants can be pinched or cut back to delay flowering. Border Phlox can be cut back by one half in early to mid June when they are in tight bud. Flowering will normally be delayed by two weeks. Flower size is also reduced with pruning before flowering. They prefer moist, rich, high organic soil.
Plants have a long bloom period even without deadheading. R. triloba is not as long lived as some Rudebeckia. The basal foliage remains evergreen. In a garden setting , pinching or cutting back may be desirable for sturdier growth.
Deadheading of perennial Salvia encourages a long bloom period. Deadhead to lateral buds. Provide well drained soil for best performance. They have a tendency to flop if given too much shade or overly rich soil. Any division should be done in the spring.
Deadhead after flowering to enjoy the attractive blue green leaves. Divide every 4-5 years.
Plants may flop if grown in too much shade or in overly rich soil. They respond well to the Chelsea chop in May. Plants can be cut back to 10cm when they are about 20cm tall. Provide well drained soil and full sun for best performance. Drought tolerant.
Deadheading can prolong bloom through the summer. Several flowers are born per flower stalk and they usually open from the top down. Deadhead old flowers down to new lateral flower buds, then cut the entire stalk off at the base when all the flowering is finished. Sporadic rebloom amy occur. Well drained soil, are drought tolerant. Division if required should be done in spring.