Gladioli

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Flowers_Gladioli

"Gladioli - definition of gladioli by The Free Dictionary
1. also glad·i·o·la (-lə) Botany Any of numerous plants of the genus Gladiolus, native chiefly to tropical and southern Africa and having sword-shaped leaves and showy, variously colored, irregular flowers arranged in one-sided spikes."

'Gladioli need plenty of water to flower well, so if you can, dig a trench and pile in well-rotted manure at the base before planting. This will help feed the bulbs and will also retain water to ensure a more regular supply. If you have bought quite a few, don’t plant them all at once. Plant fifteen corms every couple of weeks from early May to July to give a succession of flowers through the summer and autumn.'

https://www.sarahraven.com/articles/how_to_grow_gladioli.htm