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Flowers in Focus: March Planting and Care Tips

Blossom and Bloom: Your Comprehensive Guide to Flower Care in March

irishgardenstg by irishgardenstg
March 30, 2023

Sowing and Planting

  • Sow French marigolds, petunias, dahlias, and other summer bedding seeds in the coming weeks.
  • Start flower seeds indoors with heat and then move them to a cooler greenhouse; a small heated propagator can help raise plants successfully.
  • Sow seeds of sweet peas and support autumn-raised plants with light canes.
  • Plant perennial flowers in pots at any time.
  • Plant gladiolus corms and lily bulbs directly outdoors from mid-March.
  • Hardy annual flowers, such as calendula, candytuft, and California poppy, can be sown now.

Lifting, Dividing, and Moving

  • Complete lifting and dividing herbaceous flowers soon if the soil is dry enough; water them until they re-establish fully.
  • Ornamental grasses move best at this time of year.
  • Move spring bulbs “in the green” as the flowers fade; separate bulbs of different colors while flowers are still present.
  • Lift green, full-leaf spring bulbs just after flowering and move them to other areas if necessary.

Timing and Late Season Planting

  • It’s getting late for sowing bedding flowers as they will flower very late; buy plants in May instead.
  • Some quick-maturing bedding flowers like dahlias and marigolds will still do well if sown late.
  • Hardy annual flowers sown now will flower in late summer.
irishgardenstg

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