The Landscape Year Here Starts in October, Not April

Garden calendars written for the rest of the country put the busy season in spring and the rest in maintenance. Laredo runs on a different clock. With an average July high of 100.3F and 74.2 days a year at or above 100F, summer here is a survival period for plants, not a growth period. The work that changes a yard belongs to the cool months, and October is the start of the year.

Understanding that reorders almost everything a homeowner does outside.

Why the cool season is the productive one

A newly planted shrub spends its first months building roots outward into surrounding soil. It cannot do that while its leaves are losing water faster than a small root ball can supply it. Plant in June and every drop of energy goes into staying alive; plant in November and the same plant has four or five mild months to extend roots before the heat arrives.

The soil helps. Ground temperature here stays warm well into December, so roots keep growing long after the air has cooled. That is the window: warm soil, mild air, low evaporative loss. It does not exist in April, which is already heating up, and it certainly does not exist in July.

The same logic applies to lawn renovation, bed reconstruction and tree planting. It applies less to hardscape and irrigation, which can be built any time of year. That is useful, because it means a phased project can put construction in during summer and planting in during autumn without losing a season. The hardscaping pages cover the construction side.

October through December

October. The single best planting month of the year. Trees, shrubs, perennials and ornamental grasses all go in now. Soil is still warm, air is dropping out of the hundreds, and irrigation needs are falling. This is also when a bed layout gets rebuilt rather than patched, because you can dig without fighting the heat.

November. Planting continues. Mulch goes down or gets topped up to three inches, which insulates root zones going into winter and holds whatever rain arrives. Warm-season turf, Bermudagrass and buffalograss, begins going dormant, and irrigation run times should be cut back hard rather than left on a summer program.

December. Quiet month. Dormant weed control, tool maintenance, and the last chance to plant containerised natives before the coldest weeks. Watch soil moisture rather than the calendar: a dry December followed by a cold snap is harder on plants than a moist one, because moist soil holds heat.

January through March

January. The coldest stretch, and the right time for structural pruning on deciduous trees while the branch architecture is visible and the tree is dormant. Cold damage from a hard event is best assessed here, though the decision to remove anything can wait.

February. Cut back frozen or spent perennials to living wood. Lantana, salvias, esperanza and damianita all take a hard late-winter cut and come back stronger for it. This is also when a soil test, if you want one, gives the most useful answer before the growing season starts.

March. The last good planting month, and the point at which irrigation gets checked before the first real load of the year. Heads that were knocked out of alignment over winter, cracked drip line, and a controller still running a January program are the common findings. Pre-emergent weed control goes down early in the month. After March, planting anything is a bet on the summer being kind.

The maintenance pages cover how this schedule is usually handled year round, and the irrigation pages cover the spring system check.

Why summer pruning and summer fertilising backfire

Both push a plant to do the one thing it cannot afford to do in July: produce new growth.

Pruning removes leaf area that was shading the plant’s own wood and the soil beneath it. Cut a shrub hard in July and you expose interior branches that have never seen direct sun to a 100F afternoon, which scorches them. You also trigger a flush of soft new growth at exactly the moment the plant has least water to support it. That new growth is thin, pale, and the first thing to burn.

The same is true of trees. Removing canopy in summer exposes bark that has been shaded for years, and sunscald on a young trunk is a permanent injury rather than a cosmetic one.

Fertiliser does the same thing chemically. Nitrogen tells a plant to grow leaves. In July, when soil moisture is limited and the plant is already running a deficit, that instruction produces weak tissue and increases water use at the worst possible time. On turf it is worse, because a lawn pushed into growth under a one-day-a-week watering schedule cannot keep up with what it has been told to do.

What summer work looks like here is narrow and useful: mowing at the tallest setting the grass tolerates so the blades shade their own roots, mulch top-ups, hand removal of weeds before they seed, monitoring irrigation for breaks, and dead-heading where it matters. Deep, infrequent watering inside the permitted window rather than light frequent watering.

Light shaping of a shrub that has thrown a wayward branch is fine. Structural work is a January job.

Fitting it to the water rules

The cool season also happens to be when supplemental water is cheapest to supply and least restricted in effect. The 2024 application of Stage 3 held landscape irrigation to a single assigned day each week, inside set morning and evening windows, with drip and a continuously attended hose exempt. Stages move with river conditions, and the Laredo Utilities Department is the source of truth on which one applies now.

A plant installed in October needs establishment watering through a period when watering needs are low, which is far easier to deliver within the rules than the same watering in July. That alignment is not a coincidence; it is the practical reason the cool season works. Our watering rules guide covers scheduling in detail, and AgriLife Extension sets out establishment principles in its Earth-Kind garden and landscape material.

For work you want priced ahead of October, the cost guide gives the brackets, and a short enquiry is how a free quote gets arranged with a landscaping company here.