The UK has an extraordinary collection of gardens open to the public, from the manicured grounds of grand estates to more intimate green spaces where the owners have made their mark. Whether it’s a “secret” walled garden, a favourite urban green oasis or an unheralded horticultural wonder, we’d love to hear about it.

The best tip of the week, chosen by Tom Hall of Lonely Planet, will win a £200 voucher to stay at a Coolstays property – the company has more than 3,000 worldwide. The best tips will appear in the Guardian Travel section and website.

If you have a relevant photo, do send it in – but it’s your words that will be judged for the competition.

Keep your tip to about 100 words

We’re sorry, but for legal reasons you must be a UK resident to enter this competition.

The competition closes on Monday 12 May at 9am BST

Have a look at our past winners and other tips

Read the terms and conditions here