Exact county boundary
The public tool releases Harris County guidance only after Harris County is selected. If your garden is in another county—even elsewhere in the Houston metropolitan area—the Harris schedule is not substituted.
Texas · Harris County · reviewed local evidence
Harris County vegetable planting calendar
Use a planting calendar built for Harris County instead of borrowing dates from a neighboring county, a hardiness zone, or a generic national chart. TerraEvidence keeps the local source, planting action, evidence fit, and date limits attached to every reviewed window.
Coverage: Harris County, Texas only. Other counties remain unavailable until their own evidence packages pass review.
Verified public coverage
This page describes the same reviewed Harris County evidence used by the interactive planting tool.
TerraEvidence does not create a second set of dates for search pages. The interactive What Can I Plant Now? tool remains the single public interface for reviewing the approved Harris County crop windows by month, crop, or year.
Why locality matters
Harris County planting guidance is not a Texas-wide schedule.
Planting timing can shift with local heat, cold, rainfall patterns, soil conditions, crop type, and the source method used to describe the season. A hardiness zone is useful for some questions, but it does not replace a reviewed local vegetable planting calendar.
Seasonal guidance, not a weather guarantee
The reviewed windows describe source-backed seasonal timing. They do not guarantee that a particular day is safe from heat, cold, flooding, drought, pests, or other local conditions.
How to read the calendar
Keep favorability, planting action, and date precision separate.
Those details answer different questions and should not be collapsed into one label.
Preferred reviewed window
An Ideal window represents the more favorable portion of the reviewed source guidance for that crop and planting action. It is still seasonal guidance rather than a live-weather promise.
Reviewed but less favorable
A Marginal window is still supported by the reviewed source, but conditions are less favorable than in the preferred window. TerraEvidence keeps it visible instead of pretending every supported month has the same fit.
Planting action matters
“Plant” can mean different things. TerraEvidence keeps source-supported actions separate, including direct sow outdoors, transplant outdoors, and crop-specific actions such as planting cloves or sets when the evidence calls for them.
Month-level precision stays month-level
The controlling Harris County source uses graphical seasonal windows. TerraEvidence does not invent exact day boundaries from those graphics. A month overlap means the reviewed window overlaps that month; it does not create a guaranteed first or last planting date.
What you can look up
Move from a county overview to the crop or month you actually need.
The Harris County tool includes reviewed windows across warm-season vegetables, cool-season vegetables, leafy greens, roots, legumes, and other common garden crops. Examples include tomatoes, peppers, broccoli, cabbage, carrots, beans, cucumbers, squash, lettuce, radish, spinach, and corn.
NOW
Choose a review month and scan the crops with approved Ideal or Marginal overlap for Harris County.
CROP
Select one crop and review its complete approved Harris County timing instead of searching through a large chart.
YEAR
Scan the whole year using the same approved evidence, with Ideal and Marginal states kept distinct.
Source and provenance
Where the Harris County planting guidance comes from
Source basis: Texas A&M AgriLife Extension Service — Harris County, Vegetable Garden Planting Dates for Harris County.
TerraEvidence independently reviews and normalizes factual planting information into its own data model and interface. The source chart, graphics, page layout, logos, and protected marks are not reproduced. Source names identify provenance only; TerraEvidence is not affiliated with or endorsed by Texas A&M AgriLife.
Evidence boundary: the public Harris County records preserve the reviewed crop, planting action, source wording, Ideal or Marginal evidence fit, geographic scope, and limits on date precision. Unsupported locations receive no borrowed Harris County dates.
Common questions
Before using the Harris County calendar
Is this a Houston vegetable planting calendar?
It applies when the garden itself is in Harris County, including Harris County portions of Houston. Houston-area gardens in another county should not use Harris County dates until that county has its own reviewed evidence package.
Does TerraEvidence change the calendar based on today's weather?
No. Reviewed seasonal guidance and current weather are separate evidence layers. Weather can provide a caution, but it does not silently rewrite the reviewed local source windows.
Why are there no exact first and last planting days on this page?
The source precision does not justify invented day-level boundaries. TerraEvidence keeps the public claim no more precise than the evidence supports.
What if my county is not available?
The tool fails closed. TerraEvidence would rather show no local schedule than borrow one from a neighboring county and present it as local evidence.
Ready to use
Open the reviewed Harris County planting tool.
Choose Harris County, then use NOW, CROP, or YEAR to see the approved local planting windows with evidence details one click away.
What can I plant now in Harris County?