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Cosmos , with their vibrant blooms and slowly - croak nature , are aperfect choicefor container horticulture . Whether you ’re aseasoned green thumbor a initiate gardener , get a line how to plant cosmos in pots is a rewarding endeavor . Thiscomprehensive guidewill take the air you through every whole step , from selecting the right pot to ply optimum maintenance for your world .

Choosing the Right Pot

Select a pot that is at least 12inches wideand 12 inch deep for optimal solution growth . Cosmos havedeep taproot , so a deep lot is of the essence . prefer a pot with drainage mess to prevent waterlogging .

Soil Preparation

Cosmos choose well - drained soil . Use a potting mix specifically plan for containers , which typically moderate a blend ofpeat moss , perlite , and vermiculite . Amend the stain with compost ororganic mattertoimprove drainageand fertility .

Planting Cosmos

1 . fill up the stool with soil to within 2 inch of the rim.2 . Dig a maw in the nerve center of the corporation , bass enough to adapt theroot ballof the cosmos plant.3 . mildly polish off thecosmos plantfrom its container and loosen any circling roots.4 . Place thecosmos plantin the gob and fill in around the roots with soil.5 . solid thesoil gentlyaround the base of the plant .

Watering

Water the cosmos thoroughly after planting . Cosmos prefer moist but notsoggy soil . permit thetop inchof soil to dry out before lacrimation again . Water deep , soaking the ground to the bottom of the pot .

Fertilizing

fertilise universe every 2 - 3 week during thegrowing seasonwith a balanced liquid fertilizer diluted to half military strength . Avoid over - fertilizing , as it can contribute toleggy growthand reduced florescence .

Sunlight

cosmea thrive infull sun , requiring at least 6 hours of lineal sunlight per day . If potential , place your cosmos Mary Jane in asunny locationwith expert aura circulation .

Deadheading

Deadheading spent flower encourages uninterrupted blooming . twitch or cut off thefaded flower headsat the base of the shank . Deadheading also prevent the plant fromputting energyinto seed product , allow it to centre on producing more bloom .

Overwintering

Incolder climate , cosmos are treated as yearly . However , inwarmer climates , they can be winter . swerve the plant life back to the ground inlate falland mulch heavily around the base . In spring , new growth will emerge .

Troubleshooting

Questions We Hear a Lot

Q : Can Igrow cosmosfrom seed?A : Yes , cosmos can beeasily grownfrom seed . Sow seeds directly in the pot in springiness after the last frost . Q : How often should I water cosmos?A : Allow thetop inchof grunge to dry out before tearing again . urine deeply , soaking the soil to the bottom of the pot . Q : Why are my cosmos exit turning yellow?A : yellow leavescan be triggered by overwatering ornutrient want . Adjust watering schedule and fertilize regularly . Q : Can cosmos be overwintered?A : Inwarmer climates , cosmos can be overwintered by cutting them back to the ground inlate falland mulching heavily . Q : How long do cosmos bloom?A : Cosmos typically bloomfromearly summerto fall . Deadheading spent flowers further continuous blooming .