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 $211, a growth of 138%.
Most valuable 2011 LEGO Seasonal set
3300002 Holiday Set 2 of 2 $25.00
Highest growth 2011 Seasonal set
40018 Easter Bunny +308.42%
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 $17.25
Growth  +245.7%
Annual growth 4.6%

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 $17.36
Growth  +247.9%
Annual growth 12.2%

40017 Easter Basket

Theme / Subtheme Seasonal / Easter
Year 2011
Pieces 86
Availability Retired
40017 LEGO Easter Basket
Retail $4.99
Value $16.14
Growth  +223.4%
Annual growth 5.7%

40018 Easter Bunny

Theme / Subtheme Seasonal / Easter
Year 2011
Pieces 95
Availability Retired
40018 LEGO Easter Bunny
Retail $4.99
Value $20.38
Growth  +308.4%
Annual growth 9.0%

40020 Halloween Set

Theme / Subtheme Seasonal / Halloween
Year 2011
Pieces 71
Availability Retired
40020 LEGO Halloween Set
Retail $4.99
Value $11.69
Growth  +134.3%
Annual growth 6.3%

40021 Spiders Set

Theme / Subtheme Seasonal / Halloween
Year 2011
Pieces 54
Availability Retired
40021 LEGO Halloween Spiders Set
Retail $4.99
Value $8.04
Growth  +61.1%
Annual growth 3.3%

40022 Mini Santa Set

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 72
Availability Retired
40022 LEGO Christmas Mini Santa Set
Retail $4.99
Value $8.94
Growth  +79.2%
Annual growth 4.8%

40023 Holiday Stocking

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 76
Availability Retired
40023 LEGO Christmas Holiday Stocking
Retail $4.99
Value $8.97
Growth  +79.8%
Annual growth 5.9%

40024 Christmas Tree

Theme / Subtheme Seasonal / Christmas
Year 2011
Pieces 77
Availability Retired
40024 LEGO Christmas Tree
Retail $4.99
Value $14.79
Growth  +196.4%
Annual growth 7.7%

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 $14.58
Growth  +82.5%
Annual growth 5.7%

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 $16.09
Growth  +101.4%
Annual growth 4.7%

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 $11.95
Growth  +49.6%
Annual growth 3.3%

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 $25.00
Growth  +150.3%
Annual growth 5.7%

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 $19.99
Growth  +100.1%
Annual growth 4.8%