1.   The rubble would make good drainage.

2.   Although it appreciates water during the growing season, good drainage is essential.

3.   An organically enriched soil is best, and good drainage is important.

4.   And good drainage is important.

5.   And tarragon is like them in requiring both lots of sun and good drainage.

6.   Artemisia, like all silver-foliage plants, requires good drainage.

7.   Be sure to add some potting shards or mulch at the bottom of the pot to help create good drainage.

8.   Blooms pink in mid-October, needs good drainage.

9.   -- Make sure you have good drainage.

10.   A mixture of equal parts compost, clean sand and good potting soil will help ensure good drainage as well as provide nutrients.