| Hope Valley Flower Club | S30 |
| Horam & Heathfield Flower Club | Heathfield |
| Hordle Flower Club | SO41 |
| Horley Flower Club | Horley, RH6 7JA |
| Horncastle Flower Club | LN9 |
| Horning & District Flower Arrangement Club | NR12 |
| Horsham Flower Club | RH12 5PJ |
| Horsley Floral Decoration Group.. | East Horsley, KT24 6QT |
| Horwich Floral Art Club | BL1 |
| Houghton Flower Guild | CA3 |
| Hoylake Flower Club | Hoylake, CH47 3BU |
| Hucknall Flower Arranging Group | NG5 |
| Huddersfield Flower Club | HD2 |
| Huntly & District Flower Arrangement Society | AB54 |
| Hurworth Flower Club | |
| Hythe Flower Club (Hants) | SO45 6AA |
| Hythe Flower Club (Kent) | CT21 5ND |
| Iford Floral Art Club | BH6 |
| Ikebana International | BT18 |
| Ikebana International Huddersfield (Affiliated Society) | HD6 |
| Ikebana Wales Study Group, Pencoed | CF42 |
| Ile Valley Flower Club | Ilminster, TA19 9RE |
| Ilfracombe Floral Art Club | EX34 |
| Ilkley Flower Club | Ilkley, LS29 9DZ |
| Impetus |
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