Care Guide for Central Texas (Zone 8b)

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Sun Requirements 

• Rosemary thrives in full sun, including harsh afternoon rays.
• It needs at least 6-8 hours of direct light to stay compact and aromatic.
• If your rosemary looks leggy or pale, it needs more sun.

Watering 

Rosemary prefers dry conditions – treat it like a Mediterranean shrub.

• Water lightly 1× per week in beds.
• Containers may need watering every 4-5 days during heat waves.
• Let soil dry out completely between waterings.
• Avoid soggy soil – rosemary hates wet feet.

Signs of underwatering: slight droop (rare).

Signs of overwatering: yellowing leaves, mushy stems, root rot.

Soil & Fertilizer (Organic‑Only)

Use a very well‑draining mix:

• Compost
• Coarse sand
• Perlite
• Small gravel (optional but excellent)

Container rosemary

• Monthly compost tea
• Monthly worm castings (light top‑dress)
• NO fish emulsion
  • Rosemary is extremely sensitive to nitrogen
  • Heavy nitrogen = floppy stems, reduced aroma, weaker essential oils
• Optional in peak heat (July-August):
  • Extra compost tea mid‑month if growth looks tired or soil biology needs support
• Very light feeder; thrives on lean, well‑drained soil even in containers

In‑ground rosemary

• Mediterranean herbs evolved in poor, rocky soils – they simply don’t want nitrogen
• Same as container
• Monthly compost tea
• Monthly worm castings
• No fish emulsion
• In-ground rosemary often needs even less feeding because soil retains nutrients better

Organic Pest Control 

Rosemary is naturally pest‑resistant.

Occasional issues:

• Aphids
• Spider mites
• Root rot from overwatering

Organic solutions:

• Neem oil at dusk
• Insecticidal soap for aphids
• Increase airflow to prevent mites

Avoid chemical pesticides – rosemary is used in culinary blends.

Container vs In‑Ground Care

Container Care

• 3-7 gal containers
• Excellent drainage required
• Water lightly
• Perfect for patios and herb racks

In‑Ground Care

• Plant in raised beds or borders
• Loves rocky, sandy soil
• Mulch lightly (not heavily)
• Can grow into a large shrub (3-5 ft)

Warnings

• Overwatering is the #1 killer of rosemary.
• Heavy clay soil must be amended.
• Avoid shade – rosemary becomes leggy and weak.
• Humidity can cause mildew – ensure airflow.

Harvest Instructions

Rosemary is ready when:

• Stems are firm
• Leaves are fragrant
• Plant is at least 68 inches tall

Harvest by snipping stems with scissors.

Best flavor is before flowering, but you can harvest anytime.

Frequent harvesting = bushier growth.

Drying & Storage

Rosemary dries beautifully:

• Hang bundles upside‑down
• Or dry on screens
• Or dehydrate at 95-105°F

Strip leaves once dry and store in airtight jars.

Properly dried rosemary keeps for 6-12 months.

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