In 2011, LEGO released 14 Seasonal sets across 4 subthemes, all of these sets have been retired. Subthemes for that year included Christmas, Easter, Halloween, and Valentines Day. For that year, the total price of all retail sets cost $89, today those sets are valued around $238, a growth of 168%.
Most valuable 2011 LEGO Seasonal set
3300002 Holiday Set 2 of 2 $28.14
Highest growth 2011 Seasonal set
40018 Easter Bunny +319.24%
14 sets

40015 Heart Book

Theme / Subtheme Seasonal / Valentine's Day
Year 2011
Pieces 51
Availability Retired
40015 LEGO Valentine's Day Heart Book
Retail $4.99
Value $18.20
Growth  +264.7%
Annual growth 9.5%

40016 Valentine Letter Set

Theme / Subtheme Seasonal / Valentine's Day
Year 2011
Pieces 41
Availability Retired
40016 LEGO Valentine's Day Valentine Letter Set
Retail $4.99
Value $19.19
Growth  +284.6%
Annual growth 12.5%

40017 Easter Basket

Theme / Subtheme Seasonal / Easter
Year 2011
Pieces 86
Availability Retired
40017 LEGO Easter Basket
Retail $4.99
Value $19.26
Growth  +286.0%
Annual growth 11.6%

40018 Easter Bunny

Theme / Subtheme Seasonal / Easter
Year 2011
Pieces 95
Availability Retired
40018 LEGO Easter Bunny
Retail $4.99
Value $20.92
Growth  +319.2%
Annual growth 8.3%

40020 Halloween Set

Theme / Subtheme Seasonal / Halloween
Year 2011
Pieces 71
Availability Retired
40020 LEGO Halloween Set
Retail $4.99
Value $13.13
Growth  +163.1%
Annual growth 6.0%

40021 Spiders Set

Theme / Subtheme Seasonal / Halloween
Year 2011
Pieces 54
Availability Retired
40021 LEGO Halloween Spiders Set
Retail $4.99
Value $8.32
Growth  +66.7%
Annual growth 2.1%

40022 Mini Santa Set

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 72
Availability Retired
40022 LEGO Christmas Mini Santa Set
Retail $4.99
Value $9.00
Growth  +80.4%
Annual growth 4.6%

40023 Holiday Stocking

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 76
Availability Retired
40023 LEGO Christmas Holiday Stocking
Retail $4.99
Value $8.90
Growth  +78.4%
Annual growth 5.4%

40024 Christmas Tree

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 77
Availability Retired
40024 LEGO Christmas Tree
Retail $4.99
Value $14.60
Growth  +192.6%
Annual growth 8.3%

853344 Holiday Bauble with Red Bricks

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 30
Availability Retired
853344 LEGO Christmas Holiday Bauble with Red Bricks
Retail $7.99
Value $24.97
Growth  +212.5%
Annual growth 9.4%

853345 Holiday Bauble with Gold Bricks

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 43
Availability Retired
853345 LEGO Christmas Holiday Bauble with Gold Bricks
Retail $7.99
Value $18.70
Growth  +134.0%
Annual growth 8.1%

853346 Holiday Bauble with Green Bricks

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 36
Availability Retired
853346 LEGO Christmas Holiday Bauble with Green Bricks
Retail $7.99
Value $14.99
Growth  +87.6%
Annual growth 12.9%

3300002 Holiday Set 2 of 2

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces / Minifigs 117 / 1
Availability Retired
3300002 LEGO Christmas Holiday Set 2 of 2
Retail $9.99
Value $28.14
Growth  +181.7%
Annual growth 5.6%

3300020 Holiday Set 1 of 2

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces / Minifigs 98 / 1
Availability Retired
3300020 LEGO Christmas Holiday Set 1 of 2
Retail $9.99
Value $19.98
Growth  +100.0%
Annual growth 3.0%