Grid Garden solutions (levels 1 to 28) - https://cssgridgarden.com/

grid-garden.css

/* Level 1 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 3;
}

/* Level 2 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#poison {
  grid-column-start: 5;
}

/* Level 3 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 1;
  grid-column-end: 4;
}

/* Level 4 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 5;
  grid-column-end: 2;
}

/* Level 5 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 1;
  grid-column-end: -2;
}

/* Level 6 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#poison {
  grid-column-start: -3;
}

/* Level 7 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 2;
  grid-column-end: span 2;
}

/* Level 8 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: 1;
  grid-column-end: span 5;
}

/* Level 9 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column-start: span 3;
  grid-column-end: 6;
}

/* Level 10 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column: 4 / 6;
}

/* Level 11 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column: 2 / span 3;
}

/* Level 12 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-row-start: 3;
}

/* Level 13 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-row: 3 / 6;
}

/* Level 14 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#poison {
  grid-row: 5 / 6;
  grid-column: 2 / 3;
}

/* Level 15 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-row: 1 / 6;
  grid-column: 2 / 6;
}

/* Level 16 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-area: 1 / 2 / 4 / 6;
}

/* Level 17 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water-1 {
  grid-area: 1 / 4 / 6 / 5;
}

#water-2 {
  grid-area: 2 / 3 / 5 / 6;
}

/* Level 18 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

.water {
  order: 0;
}

#poison {
  order: 1;
}

/* Level 19 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

.water {
  order: 0;
}

.poison {
  order: -1;
}

/* Level 20 */

#garden {
  display: grid;
  grid-template-columns: 50%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column: 1;
  grid-row: 1;
}

/* Level 21 */

#garden {
  display: grid;
  grid-template-columns: repeat(8, 12.5%);
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-column: 1;
  grid-row: 1;
}

/* Level 22 */

#garden {
  display: grid;
  grid-template-columns: 100px 3em 40%;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

/* Level 23 */

#garden {
  display: grid;
  grid-template-columns: 1fr 5fr;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

/* Level 24 */

#garden {
  display: grid;
  grid-template-columns: 50px 1fr 1fr 1fr 50px;
  grid-template-rows: 20% 20% 20% 20% 20%;
}

#water {
  grid-area: 1 / 1 / 6 / 2;
}

#poison {
  grid-area: 1 / 5 / 6 / 6;
}

/* Level 25 */

#garden {
  display: grid;
  grid-template-columns: 75px 3fr 2fr;
  grid-template-rows: 100%;
}

/* Level 26 */

#garden {
  display: grid;
  grid-template-columns: 20% 20% 20% 20% 20%;
  grid-template-rows: 12.5px 12.5px 12.5px 12.5px 1fr;
}

#water {
  grid-column: 1 / 6;
  grid-row: 5 / 6;
}

/* Level 27 */

#garden {
  display: grid;
  grid-template: 60% 40% / 200px;
}

#water {
  grid-column: 1;
  grid-row: 1;
}

/* Level 28 */

#garden {
  display: grid;
  grid-template: 1fr 50px / 20% 80%;
}