How to Grow Gladioli


  • Planting Instructions
  • Soil Preparation
  • Maintaining Gladioli

How to Grow Gladioli

Planting Instructions

  • Summer flowering Gladioli are available to purchase in Spring
  • You can stagger the sowing times of your bulbs & this will in turn give you blooms over longer periods
  • Plant a few bulbs when they arrive & you can store the remaining bulbs until ready to plant
  • To store your bulbs, remove them from packaging and store in a cool place
  • Planting season for Gladioli: Mid to late Spring
  • Plant roots so that the crown or growing point is 5cm below soil level
  • Spacing: 15 to 40cm apart
  • Gladioli companion plants include: Grasses, Iris, Liles, Alliums & Penstemon

Soil Preparation

  • Choose a sunny spot for your bulbs
  • Gladioli grow to about 50cm in height, they are therefore suited to the front of herbaceous borders
  • Requires a well-draining soil
  • Avoid damp & water logged soils
  • Prepare the soil by loosening with a garden fork
  • Add a layer of organic matter or farmyard manure to the surface of the soil & work into the soil with your fork
  • If the soil is damp or drains poorly you should sit the bulbs on a bed of sand as this will improve drainage & prevent the bulbs from rotting
  • If you don’t have sand, you can use horticultural grit, vermiculite or RHS bulb starter
  • Soil pH: Acidic to neutral

Maintaining Gladioli

  • After flowers fade in Autumn, you can cut back & remove old foliage
  • In Winter mulch over the top of your gladioli bulbs to protect from frost
  • Old leaves, straw, manure or chippings will do for this
  • In early Spring feed plants with general plant fertiliser or potash
  • Clumps need to be divided every 3 or 4 years. This will give you more plants & better blooms

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