Northern Ireland Plug‑Planting Calendar (Month‑by‑Month Guide)
Plan your year with confidence.
Northern Ireland’s weather can be unpredictable, so timing matters. This month‑by‑month plug‑planting calendar helps you make the most of every season.
Month‑by‑Month Calendar
Feb–Mar
Start hardy plugs indoors or under cover (hellebores, primulas).
April
Pot on salvias, penstemons; begin hardening off late month.
May
Main planting month. Ideal for agapanthus, osteospermum, verbena.
June–July
Fill gaps with summer colour; water consistently.
Aug–Sept
Plant perennials for early establishment before winter.
October
Ideal for hellebore planting; prep for winter.
Nov–Jan
Mulch, protect pots, plan next year’s planting.
FAQs
When is last frost in NI?
Often late April/early May inland — coastal areas warm earlier.
Can I plant plugs in summer?
Yes, just water consistently for the first week.
Call to Action
Match your planting to the perfect seasonal window.
