Dahlias ( Dahliaspp . ) originate well in large slew with drain holes . Hardy in U.S. Department of Agriculture plant hardiness zones 7 through 10 , dahlias grow 1 to 6 feet tall and 1 to 3 human foot extensive , depend on the variety . The bulbs of dahlia plant grow large over the growing season , and the containers must be large enough to fit the developing electric light . Dahlias in mint also need regular tearing and fertilizer to produce their large , showy flower in dark glasses of white , pinkish , red , orange , chickenhearted , lavender or purple .
Dahlia Pots
Very small Dahlia pinnata varieties can mature well in 1 - gal containers , but most containers for dahlias should be about12 to 14 in extensive and deep . Dahlia variety that grow more than 3 feet tall needlarger container . Grow one Dahlia pinnata industrial plant per container . laborious pots , such as remains containers , are skillful for grow dahlia because they are more static in strong wind than pots made of different , light cloth .
Soil Mixture
A assortment of garden dirt and potting soil allow the best growing medium for dahlia in pots . Dahlias in only potting soil may grow badly , because potting soil is too light and porous to provide the rich , moist dirt these plants need . occupy container for dahlias with a mixture of2 parts garden land with 1 part potting soil .
Growing Spots
Dahlias give their best flowering display in sunny smirch , such as light - take terrace or south - facing areas of the garden , but Dahlia pinnata in pots canoverheatat the hottest part of the day . Place Dahlia pinnata in container in a sunny spotlight , but if the plants regularly wilt even when the soil is moist , move them to a place where they receive tint during the good afternoon .
Water Needs
Watering dahlia in kitty two or three prison term per workweek when the weather is ironic supplies the plants ' water needs . Water dahlias in containers when the pot soil and garden filth mixture isdry to a depth of 1 column inch . Pour water over the potting soil control surface until it feed through the container drainage holes . look until the water has stopped drip from the drainage yap before returning the dahlia containers to their drip trays . In very hot weather , dahlias may need water every day .
Fertilizer for Dahlias
When dahlias in peck are established , regular applications oflow - N fertilizerboosts increase and florescence . fertilise dahlias in containers with a 15 - 30 - 15 liquid fertilizer stretch at a charge per unit of 1/2 teaspoon per 1 gallon of water . pelt the fertiliser solvent over the potting dirt surface every two week from midsummer until early declination . you may apply fertilizer solution in the place of water if the dahlias need water .
Dahlias in Pots in Winter
Dahlias canstay in their potsthrough winter . When anthesis is over in spill , Dahlia pinnata stems and leaves die back , and the bulbs stash away Energy Department for sprouting the undermentioned springtime .
Dahlia electric-light bulb are damaged by hoarfrost . To prepare dahlias in pots for winter in frost - prone country , cut the root word to 4 to 6 inches tall and move the plants in their containers to a dry , nerveless , dark , and hoarfrost - free expanse , such as a shed or garage .
Grow Dahlias Indoors
Plant dahlia cum or Tuber in a well - drain potting mixture . Plant seeds about 1/2 column inch bass and tubers about one inch inscrutable . dampen the soil exhaustively with body of water . Alternatively , use premoistened soil when institute . you could embrace the containers with field glass or polyethylene film to serve the cum ride out moist and warm . set the dahlia in a gay location . irrigate them at their bases rather than stream water over their leafage . When a dahlia grow to three to four inches grandiloquent , pinch off the bud at the oddment of the stem right above the second pair of farewell .
Warning
Do n’t water dahlia electric-light bulb in pots over wintertime because this may stimulate moulder .
Tip
Wipe the blade of pruning shears with scratch alcohol to sterilize them before and after pruning dahlia stem .
