Top 5 Gardening tasks in May from RHS
1. Protect - Still a chance of late frost so be ready to protect tender plants.
2. Plant - Earthing up time for spuds (yeahhh), and plant any remaining.
3. Plant some more - This time its the summer bedding (but not in cold areas).
4. Water - Early morning and at night for best efficiency. Use recycled water if poss.
5. Weed - You know weeds are relentless, so hoe regularly.
P.S. Remember to vent your greenhouse by opening doors and windows.