WATER WISE GARDENING

We are always looking for ways to encourage our plantings to endure the environmental changes that we place them in. Here in Missouri, where we experience extreme weather patterns, plants are expected to adapt.

A little foresight can go a long way, especially when planning a garden. Here are some tips to keep in mind when purchasing plants and preparing them for the driest, hottest days of summer.


1. Keep in mind that "drought tolerant" really does mean
TOLERANT. There is always a limit to how much a plant can tolerate before it reaches a turning point for the worse. A drought tolerant plant still must get some water!

2. Drought conditions are not the time to establish new gardens. New plantings need to be watered frequently, until well established.

3. Improve your soil to make it retain moisture: add organic matter such as compost or peat to sandy or clay soils.

4. Make smart planting choices. Select native and drought- tolerant varieties (see listing). Spend some time researching.

5. Mulch. Organic mulches such as wood chips, bark, ground corncobs, straw, grass clippings, and newspaper will retain moisture, reduce weeds, and break down to improve your soil and drainage.

6. Limit fertilizer use. Using fertilizer in drought conditions will stress your plants.

7. Pull weeds. Weeds require water to grow, and will eliminate competition of water.

8. Water in the early morning, or later afternoon, before sunset. You don’t want water sitting on your plants overnight…let the water evaporate off the leaves before the sun goes down to reduce fungal problems. One inch of water a week is sufficient, up to 2 inches of water if it is really hot. Don’t water with the sun on your plants, the droplets will magnify the sun’s rays and scorch the leaves.

9. Be smart about container plantings. Use plastic pots, instead of clay. Mulch the top of the pots, and give them part shade to relieve them of some of the heat of the day. Water more frequently (daily, or every other day). Use polymer granules (like Soil Moist) in your soil to help retain moisture.

10. Regular maintenance, like deadheading, pruning, checking for insects, and weeding, promote plant health and beautiful plants.

PLANT NAME

FLOWER COLOR

FLOWERING TIME

HEIGHT (FT)

REMARKS

Achillea

yellow, white, pink

July-Sept

1 to 3

adapts to poor soils, fern-like aromatic foliage

Aquilegia Columbine

white, blue, pink, yellow

May-June

1 to 2

Use with shrubs

Armeria – Thrift

pink

May-Aug 1

1 to 1 1/2

Grass-like foliage

Asclepias tuberosa

Butterfly Weed

orange

July-Aug

1 to 1 1/2 ft

grows in poor soil, deep rooted

Campanula Canterbury Bells

pink, purple, white

June-July

3 ft

tall accent

Coreopsis

yellow

June-Aug

3 ft

Easy to grow

Delphinium hybrids tall accent;

white, purple, blue

June-July

4 to 6 ft

may need staking

Dicentra spectabilis – Bleeding Heart

deep pink

April-June

1 ˝ ft

Use with shrubs

Echinacea purpurea

purple

Aug-Sept

4 to 6 ft

tall background

Iberis sempervirens – Candytuft

White

April-June

1 ft

evergreen foliage

Lobelia cardinalis - Cardinal Flower

bright red

July-Sept

2 ft

dense shade

Origanum "Kent’s Beauty

blue-grey

July

2 ft

spills over, plant of merit

Ornamental Grasses

(once established)

Summer-fall

2 to 7 ft

Vertical structure, focal points

Penstemon 2-3 ft

red, white, blue

June-July

2 to 3

many varieties

Phlox paniculata - Garden Phlox easy to grow

white, lavender, pink

May-July

1 to 1 ˝ ft

Physostegia virginiana False dragonhead

lavender, white

Aug-Sept

3 to 3 ˝ ft

aggressive creeper

Primula spp. Primrose

yellow, red, blue

April-May

1/2

showy spring flowers

Rudbeckia hirta – Black-Eyed Susan July

yellow

July

2-3 ft

needs space

Scabiosa caucasia – Pincushion flower

Lavender

May-Aug

1 to 1 ˝ ft

Fern-like foliage

Sedum (stonecrop)

May-Sept

˝ to 1 ft

Many varieties; succulent, tough, needs little water, summer bloom, evergreen

Stachys (lamb’s ears)

gray

Summer

˝ to 1 ft

Best variety is Helen Von-Stein, compact

Veronica spicata (speedwell)

Varieities: v.repens, v.repens ‘sunshine’ (Golden creeping speedwell), v.surculosa ‘waterperry blue’

purple

May-June

2 to 4

thrives on sun/heat. Fast growers for dry banks/rock gardens, moderate growers, spring bloom, evergreen

 

*adapted and revised, based on the Colorado State University Cooperative Extension list Xeriscaping: Garden Flowers, no. 7.231