Planting Planner loads alot of information - Planting Units, Stock Allocations and the Sowing Request master list.
Here are some tips to help with the speed of the page:
Tip 1: Archive old Sowing Requests
Configuration - Master Lists - Sowing Requests: Check the Archive box in the Grid
Tip 2: Add Filtering Details in the Sowing Request Master List
Plant Year - Specify which Planting Year you will allocate the Request Key(s)
Season - Specify which Season within the Planting Year you will allocate the Request Key(s)
Group - if your company is managing planting programs for multiple divisions, use the Group field to organize the Request Keys by division.
Apply those Filters in Planting Planner