The Institute has a diverse membership, including amateur and professional botanists, gardeners, artists, photographers, ecologists, writers, campaigners and others who have an urge to learn more about plants.

Whatever your interest, we hope you’ll join us by becoming a member for just £25 per year. Note that our building and garden are currently closed, but we continue to offer member discounts on numerous offsite events, as well as our Gazette and Seed List. 

Membership offers the following benefits:

  • Use of facilities during opening hours and by appointment, including our library, herbarium and microscopes.
  • Free entry to the garden when we are open.
  • Advance notice of our online and in-person courses, lectures, botanical field trips and workshops, with membership discounts on many events
  • Receipt of our yearly publication, the SLBI Gazette*, to which members may submit articles reflecting their own varied botanical interests
  • Up to 10 packets of seeds from our annual Seed List of seeds collected from the SLBI garden and members (available in Spring) 
  • Invitations to member-only events
  • The chance to join a community of plant lovers from all ages and backgrounds, and to support the future of botanical education in South London

    *Our Gazettes are currently posted out to all members.  To see an example of a recent Gazette, please click here

Seed List 2024

Our long awaited 2024 Seed List will be available early in the year and will be available for our members to select their choice of seeds of 10 free packets each.   

Join now

  • Join online (Paypal or credit/debit card): Please use the form on the right of this page.
  • Join by post (cheque or bank transfer)    Fill in and return our Membership Form 2024

If you have any queries about joining please contact us

Buy a Gift Membership or Voucher

Do you know someone who loves plants? Our membership and vouchers make wonderful gifts, whether for Christmas, birthdays, anniversaries or to say thank you. We’ll send you or the recipient a special card by post, which you can personalise with a message.
All you need to do is fill out our Gift Membership Form and email or post it back to us. Please allow up to 10 days for us to send out your gift card.