There is at present a once-only administrative joining fee of £6 (GBP), €10 (euro) or $10 (US).
There is no annual membership fee,
but there is a small fee for attending meetings in person
(when that becomes possible again!)
To join the SABG,
you can use this Registration form
(PDF file or Word document)
and return it to the Treasurer
by post: print out the PDF or Word document, fill it in and send it to the address shown on the form, either with a UK bank cheque or postal order or pay by bank transfer or PayPal
by email to Rodney Sims firstname.lastname@example.org, preferably by editing the Word document (or PDF form if you can do that) and attaching it to the email, not forgetting to make payment by bank transfer or PayPal
More details about the ways to pay the initial joining fee
(or to make a donation towards the Bulb & Seed Exchange expenses)
can be found on the registration form or here: Payments.