The HTA says many of its members have reported record trading days with plants, while garden sundries sales were particularly strong, along with catering.
Ben Reid Garden Centre in Aberdeen reported it had "few packs of bedding left" and that customers were still looking for seed potatoes and onion sets.
Donaghadee Garden Centre in Northern Ireland reported very busy trading, again with plants and core product sales "extremely strong."
Cowells Garden Centre in Newcastle said it had experienced "the best Easter Monday ever", with supporting days equally busy.
Simon Bourne from Perrywood Nurseries in Essex reported a great week's trading all round with most things selling well with highlights being large trees and acers.
Growing media sales were strong, he said, as it usually the case over Easter, and trellis, turf and aggregates were all selling well. Outdoor leisure was very strong over the weekend with "really good" BBQ sales and large furniture sets "going well".
Burston Garden Centre in St Albans was 30% up (on 2010 figures) with plant sales up 75% and garden sundries and garden furniture both up 25%.
HTA Chief Executive Carol Paris said, "The general consensus is that the decent weather in the run up to Easter has allowed people to sort out their gardens leaving the Easter weekend to plant and replenish as well as add to existing plants.
"The slightly unsettled weather forecast for the second half of the weekend perhaps held people back from planning days out so that when the sun shone they looked closer to home for entertainment with resulting trips to local garden centres and nurseries, returning home to spend time in the garden. Great news for the industry."
On Tuesday retailers told HW that sales over the holiday weekend had been "cracking". For more click here.