This is a new mesh, and means that it's a brand new self contained object that usually does not require a specific Expansion pack (although this is possible depending on the type). It may have Recolours hosted on MTS - check below the description for more information.
These are some GT plants and planters made into separate items, so they can combined freely (also with various other modular plants/pots).
Update 2016-02-01: Added two pottable topiaries (Maxis World objects)
Living Flower ‒ re-meshed from the Living Vase wall deco, 30§, 7 colour variants
Tom’s Very Empty Flowerbox ‒ Tom’s Flowerbox sans flowers and planter (so one can put potted plants in it), 160§, 9 colour variants
The plants are available both in Buy > Deco > Plants and Build Mode, the planters are in Buy > Deco > Plants.
The topiaries are additional catalogue entries that make the existing objects pottable and put them in Buy > Deco > Plants. They are also available as outdoor plants in fran89's Liberated GT Objects upload (you can use that in parallel if you want).
The screenshots also show various pots and plants from earlier Modular Plants uploads, see the list in Related Posts for links. The stone floor is from here, the large planters used for the cypresses are from here.
All textures (and in the case of the topiaries, the actual objects) are referenced from the game files, so this won’t work without GT.
Living Flower, High Poly: 551V/479F
Living Flower, Low Poly: 452V/362F
Cypress, High Poly: 1014V/947F
Cypress, Mid Poly: 859V/777F
Cypress, Low Poly: 730V/645F
Cypress, Sun Shadow: 763V/777F
Flower Box Empty, High Poly: 712V/364F
Flower Box Empty, Low Poly: 592V/300F
Flower Box Empty, Sun Shadow: 216V/300F
Flower Box Very Empty, High Poly: 632V/316F
Flower Box Very Empty, Low Poly: 532V/266F
Flower Box Very Empty, Sun Shadow: 216V/300F
Simple Country Flower Pot, High Poly: 399V/394F
Simple Country Flower Pot, Low Poly: 368V/279F
Simple Country Flower Pot, Sun Shadow: 164V/279F
Country Flower Pot, High Poly: 407V/398F
Country Flower Pot, Low Poly: 376V/283F
Country Flower Pot, Sun Shadow: 172V/283F
Radish, High Poly: 544V/456F
Radish, Low Poly: 348V/236F
Radish, Sun Shadow: 348V/236F
Tuft, High Poly: 428V/340F
Tuft, Low Poly: 380V/292F
Tuft, Sun Shadow: 380V/292F