At the HEA AGM in Suffolk last week, 60 of its 300 members discussed plans for 2010.
HEA secretary Sarah Clare said: "Most of the public enter Hampton Court from the north and it takes them until lunchtime to reach the floral marquee in its current position. This move will give the show a boost and get the public into a buying mood."
She added: "The new layout was greeted by the members of the HEA with many positive comments."
The RHS will replace the floral marquee on the south side with an eco-village.
The HEA has used a consultant to review the way that flower shows operate. Clare said the organisation's committee was now hoping to attract marginal and younger gardeners through innovative entertainment at flower shows.
The association launched Nursery Grown and virtual flower show campaigns this year.