plant protectors providing thermal and physical protection from extreme temperature , wind , animals , and the like are well known in the art . heretofore , however , there has been a need for a self supporting , yet flexible structure which is both lightweight and sufficiently stable . there has also been a need for a plant protector which may be opened or closed at the top without the need for additional strings or ties . the instant invention addresses these long unmet needs by providing a superior plant protector . the instant device takes advantage of adroit placement of stress relief seals which act to form a basal annular ring providing enhanced structural support . a preferred embodiment of the instant device is shown in fig1 - 3 , and described below . a preferred embodiment of the instant invention is shown in fig1 . a perspective view of the novel plant protector 1 is shown . the plant protector 1 is shown as filled or partially filled and disposed as it would be used in the field . the basal annular ring 2 is shown as filled with a fluid , preferably water . the vertical tubes 3 shown are deployed in the open position . when filled with fluid , the basal annulus 2 spreads radially and pulls open the base of the central opening 4 forming an inverted conical frustum ( shown in fig5 ). when filled only two - thirds full , the vertical tubes 3 may be pushed in to form a closed , inverted cone ( shown in fig4 ). the central opening 4 , defined by the vertical tubes 3 , is the area into which a plant ( not shown ) is received . as such , the plant is protected from mechanical breakage due to wind , animals , or other physical assaults . furthermore , when the vertical tubes 3 are filled with water , the plant is protected from extreme temperatures . the plant protector 1 is best described by reference to fig2 . a 40 inch × 54 inch rectangular sheet of flexible material , such as low density polyethylene , is folded in half to form the two - layered rectangle 5 shown . the dimensions of the resulting rectangle 5 are 20 inches × 54 inches . the base 6 of the rectangle 5 is formed by the crease of the fold described above . the sides 7 and 8 of the rectangle 5 are sealed from the top 9 of the rectangle 5 to the base 6 of the rectangle 5 . the top 9 of the rectangle 5 remains open to accept fluid in the field . seals 10 , 11 and 12 are formed by heat sealing , adhesives , or similar means to form the vertical tubes 3 . the seals 10 are spaced 3 . 5 inches apart from the sides 7 and 8 and each other . each seal 10 ends at a stress relief seal 11 which enable the structure to withstand the stress applied when filled with water while at the same time optimizing flow dynamics to minimize filling time . each stress relief seal 11 has a radius of 0 . 2 inches . additional keyhole seals 12 are disposed between each stress relief seal 11 as shown . the location of the keyhole seals 12 is critical both to enable the structure to withstand the stress applied when filled with water while at the same time optimizing flow dynamics to minimize filling time , and to force the annular ring 2 into a disposition which maximizes stability of the plant protector 1 . the keyhole seals 12 are 1 inch high × 1 . 38 inches wide . all seals 11 , 12 and 10 are of sufficient width to make a strong seal depending on the material used and type of seal made . the sides 7 and 8 are joined by heat sealing , adhesives , or similar means to form the tubular plant protector 1 . as shown in fig3 the annular ring 2 is defined by the space 13 existing between the sides 7 and 8 , and below the seals 11 and 12 . fluid introduced into vertical tube 14 will first fill annular space 13 and then fill all vertical tubes 3 simultaneously . because keyhole seals 12 are centered between stress relief seals 11 , the annular ring 2 , when filled with water or another fluid , is disposed such that the inner diameter 14 of annular ring 2 is equal to the outer diameter 15 of the large tube formed by vertical tubes 3 . such disposition gives the present invention improved radial and lateral stability . preferably , the seals 11 and 12 defining the space 13 within the annular ring 2 are located as follows : the bottom 17 of each keyhole seal 12 is located 2 . 5 inches above the base 6 of the rectangle 5 . the top 19 of each keyhole seal 12 is located 3 . 5 inches above the base 6 of the rectangle 5 . the bottom 18 of each stress relief seal 11 is also located 3 . 5 inches above the base 6 of the rectangle 5 . other embodiments of the present invention may be are best described with reference to fig2 . a particular seal 16 may be omitted thereby creating a single larger vertical tube 17 which is larger than the other vertical tubes 3 . the single larger vertical tube 17 may be used to fill the plant protector 1 with water at a faster rate . it is also envisioned that one layer of the polyethylene material may be partially cut away along the top 9 of the rectangle 5 as indicated by notch 18 . said notch 18 may extend along the entire length of the top 9 of the rectangle 5 thereby affording the user facile access to the opening which runs along the top 9 of the rectangle 5 . said notch 18 increases the ease of filling the plant protector 1 . the preferred method of using the present invention entails : placing the plant protector 1 around a plant such that annular ring 2 is located on the ground around the plant and the plant is enclosed within central opening 4 . water is introduced into one of the vertical tubes 3 . since all vertical tubes 3 are interconnected by annular ring 2 , all vertical tubes 3 and annular ring 2 are filled as a result of introducing water into any one of the vertical tubes 3 . the level of filling is determined as a function of the type of plant being protected and the ambient temperature in the vicinity of the plant . by filling vertical tubes 3 only two - thirds full , vertical tubes 3 may be pushed inward towards the center of central opening 4 , thereby creating a closed , inverted conical structure ( shown in fig4 ) completely enclosing the plant . said closed disposition provides enhanced thermal protection for the plant . by filling vertical tubes 3 more than two - thirds full , vertical tubes 3 automatically remain open providing slightly less thermal protection for the plant . the user determines the preferred disposition based upon prevailing weather conditions and the characteristics of the particular plant , and fills the vertical tubes 3 accordingly . in view of the above it will be seen that the various objects and features of the invention are achieved and other advantageous results obtained . it should be understood that the description contained herein is illustrative only and is not to be taken in a limiting sense . having thus described in detail certain preferred embodiments of the present invention , it is to be appreciated and will be apparent to those skilled in the art that many physical changes could be made in the apparatus and method without altering the inventive concepts and principles embodied therein . the present embodiments are therefore to be considered in all respects as illustrative and not restrictive , the scope of the invention being indicated by the appended claims rather than by the foregoing description , and all changes which come within the meaning and range of equivalency of the claims are therefore to be embraced therein .
this invention discloses generally enclosure structures for protecting plants . more specifically , this invention discloses a method and enclosure for thermally protecting plants from extreme temperatures and physically protecting plants from wind and other physical assaults . the present invention provides plants with a flexible yet stable fluid fillable enclosure formed by a plurality of vertical tubes interconnected by a basal annular ring .