Companion Planting:
Nature’s Perfect Partnerships

The Science Behind Companion Planting

​​

Pest Confusion:

• Mixed plantings confuse pests that locate food by sight or smell. A pest seeking tomatoes has difficulty finding them when surrounded by strong-smelling basil.

Trap Cropping:

• Sacrificial plants lure pests away from main crops. Nasturtiums attract aphids, protecting nearby vegetables.

Beneficial Insect Attraction:

• Flowering companions attract pollinators and predatory insects that control pests.

Spatial Efficiency:

• Tall plants provide shade for shade-lovers; deep-rooted plants don’t compete with shallow-rooted neighbors.

Allelopathy:

• Some plants release chemicals that help (or harm) their neighbors. Marigolds suppress soil nematodes.

Nutrient Sharing:

• Legumes fix nitrogen that benefits neighboring heavy feeders.

 

BOTANICA Escario’s Proven Companion Planting Combinations

THE THREE SISTERS (Traditional Tropical Trio)

​

Corn + Beans + Squash

This ancient companion planting technique works beautifully in our Philippine garden:

Corn: Provides tall stalks for beans to climb

Beans: Fix nitrogen in soil that corn and squash use

Squash: Large leaves shade soil, preventing weeds and conserving moisture; prickly stems deter pests

 

Planting Method:

1. Plant corn first, let it reach 15cm height

2. Plant pole beans at base of corn (3-4 beans per stalk)

3. Plant squash between mounds (1.5m spacing)

 

Harvest Benefits: Complete nutrition in one garden bed—protein (beans), carbohydrates (corn), vitamins (squash)

 

TOMATO COMPANIONS

Tomato + Basil + Marigold + Borage

Our most productive tomato beds include:

    Basil: Repels aphids, hornworms, and whiteflies; improves tomato flavor; attracts pollinators

    Marigold (Tagetes): Deters nematodes underground, whiteflies above ground; attracts hoverflies (aphid predators)

Borage: Attracts bees for better pollination; deters hornworms; adds trace minerals to soil when composted

Avoid with Tomatoes: Cabbage family, fennel, corn (attracts same pests) Planting Layout:

 

Tomatoes: 60cm spacing

Basil: Between every 2 tomato plants

Marigolds: Border of bed

Borage: Corners of bed

​

PEST-DETERRENT PERIMETER PLANTINGS

Lemongrass + Marigold + Chrysanthemum

We border our garden beds with these powerful pest deterrents:

    Lemongrass: Repels mosquitoes and aphids; citronella scent masks vegetable odors from pests

    Marigold: Contains pyrethrum (natural insecticide); repels Mexican bean beetles, aphids, squash bugs

    Chrysanthemum: Source of natural pyrethrin; deters ants, roaches, Japanese beetles, spider mites

Benefit: Creates a protective barrier while adding beauty to the garden

 

NITROGEN-FIXING PARTNERSHIPS

Heavy Feeders + Legumes

We interplant nitrogen-hungry vegetables with nitrogen-fixing legumes:

Corn + Pole Beans Beans climb corn stalks while feeding them nitrogen

Cabbage + Peas Early peas fix nitrogen, then are removed when cabbage needs space

Peppers + Bush Beans Beans between pepper plants provide steady nitrogen supply

Key Principle: Plant legumes first or simultaneously; they need time to establish nitrogenfixing nodules

​

​THE SHADE PROVIDERS

Lettuce + Tomatoes (or other tall crops)

In our tropical heat, many crops appreciate afternoon shade:

Lettuce under tomatoes: Stays cool, prevents bolting (going to seed prematurely)

Cilantro under peppers: Extends harvest season

Spinach under corn: Thrives in filtered light

Spacing: Plant shade-lovers on the eastern side of tall crops for morning sun, afternoon shade

​

AROMATIC HERB PROTECTORS

Vegetables + Mediterranean Herbs

We integrate these strongly scented herbs throughout vegetable beds:

Rosemary: Deters carrot flies, cabbage moths, bean beetles

Sage: Repels cabbage moths, carrot flies; companion to cabbage family

Thyme: Ground cover that deters cabbage worms

Oregano: Provides ground cover; attracts hoverflies and parasitic wasps

Dill: Attracts beneficial wasps, ladybugs, and bees; companion to lettuce, onions, cucumbers

Avoid: Don’t plant dill near carrots (cross-pollination produces poor flavor)

​

ALLIUM MAGIC

Onions, Garlic, Chives + Various Vegetables

Alliums are garden superheroes, benefiting almost all plants:

Garlic Benefits:

Planted near roses: Deters aphids and black spot disease

With tomatoes: Repels spider mites

Near lettuce: Deters aphids

 Between strawberries: Prevents fungal diseases

Onion Benefits:

With carrots: Repels carrot flies (carrots repel onion flies—mutual protection!)

Near brassicas: Deters cabbage worms

Around strawberries: Improves growth Chives:

Under fruit trees: Prevents apple scab

With tomatoes: Improves growth and flavor

Near roses: Prevents black spot

Only Avoid with: Beans, peas (alliums stunt legume growth)

​

ROOT VEGETABLE COMPANIONS

Carrot + Onion + Leek + Radish

Our root vegetable bed is a model of companion planting:

Carrots + Onions: Classic pairing—each repels the other’s pests

Radish + Carrots: Fast-maturing radishes mark slow-germinating carrot rows; break up soil for carrots

Leeks + Carrots: Leeks repel carrot rust fly

Beets + Onions: Beets add nutrients that onions appreciate

 

PEST TRAP CROPS

Sacrificial Plants That Protect Main Crops

We strategically plant these to lure pests away:

 

Nasturtiums: Attract aphids away from vegetables (then we remove infested nasturtiums)

Mustard greens: Lure flea beetles and diamondback moths from brassicas

Radishes: Draw root maggots away from turnips and other brassicas

Amaranth: Attracts leaf miners away from spinach and chard

 

Management: Once trap crops are heavily infested, remove and destroy them (don’t compost pest-laden plants)

​

BENEFICIAL INSECT ATTRACTORS

Flowering Plants for Natural Pest Control

These flowers feed beneficial insects that eat garden pests:

Sunflowers: Attract ladybugs (eat aphids), lacewings, parasitic wasps

Provide shade for lettuce

Seeds feed birds (which eat caterpillars)

Cosmos: Long blooming season feeds beneficials continuously

Attracts hoverflies (larvae eat aphids)

Fennel: Attracts parasitic wasps, ladybugs, tachinid flies

Plant away from vegetables (it inhibits many plants)

Designate a “beneficial insect garden” section

Alyssum: Low-growing flower attracts parasitic wasps and hoverflies

Makes excellent living mulch between vegetables

 

COMPANION PLANTING CHART - BOTANICA ESCARIO QUICK REFERENCE

TOMATOES ✓ Good Companions: Basil, marigold, borage, carrots, onions, parsley, asparagus ✗ Avoid: Cabbage family, corn, fennel, potatoes

PEPPERS ✓ Good Companions: Basil, onions, spinach, tomatoes, carrots ✗ Avoid: Beans, brassicas, fennel

BEANS ✓ Good Companions: Corn, squash, cucumber, carrots, beets, radish ✗ Avoid: Onions, garlic, chives, peppers

CABBAGE FAMILY (Broccoli, Cabbage, Kale) ✓ Good Companions: Onions, sage, rosemary, beets, celery, dill ✗ Avoid: Tomatoes, peppers, strawberries, pole beans

CUCUMBERS ✓ Good Companions: Beans, corn, peas, radish, sunflower, lettuce ✗ Avoid: Aromatic herbs (sage, rosemary), potatoes, melons

CARROTS ✓ Good Companions: Onions, leeks, rosemary, sage, tomatoes, radish ✗ Avoid:

Dill, parsnips

LETTUCE ✓ Good Companions: Carrots, radish, strawberries, cucumbers, onions, beets ✗ Avoid: Celery, cabbage, parsley

SQUASH ✓ Good Companions: Corn, beans, marigold, nasturtium, radish ✗ Avoid: Potatoes

​

Sequential Companion Planting (Succession Planning) We maximize bed productivity by planning sequential companions:

Example Bed Timeline:

January-March: Cool-season lettuce + radish (radish harvested first at 30 days, lettuce at 60 days)

April-June: Tomatoes planted with basil and marigold borders

July-September: Pole beans replace tomatoes, climb same stakes

October-December: Cabbage with sage and thyme companions

This keeps soil covered and productive year-round while maintaining beneficial plant relationships.

​

Spatial Arrangements

Tall + Medium + Short (Vertical Layering):

Back row: Corn or tomatoes (staked)

Middle row: Peppers or bush beans

Front row: Lettuce or herbs

Interplanting: Slow-maturing crops (cabbage, tomatoes) interplanted with fast-maturing crops (radish, lettuce) that harvest before the main crop needs space

Border Plantings: Aromatic herbs and flowers around perimeter provide pest protection and beneficial insect habitat

​

What NOT to Plant Together

Allelopathic Conflicts:

Fennel inhibits most vegetables (plant separately)

Black walnut trees kill tomatoes, peppers, eggplant (allelopathic compound juglone)

Sunflowers can inhibit potatoes

​

Nutrient Competition:

Heavy feeders together (tomatoes + corn) compete for nutrients

Deep roots with deep roots (carrots + parsnips) compete for space

​

Pest Attraction:

Tomatoes + potatoes attract same diseases (blight)

Cucumbers near melons spread disease between crops

 

BOTANICA Escario’s Guild System

We’ve created “plant guilds”—groups of plants that support each other in multiple ways.

​

Our star guild:

TROPICAL FRUIT TREE GUILD Mango or Avocado (Center) + Supporting Cast

Tree canopy: Provides shade and structure

Nitrogen fixers: Pigeon pea or desmodium at drip line

Dynamic accumulators: Comfrey draws up deep nutrients

Pest deterrents: Lemongrass, tanglad around perimeter

Ground cover: Sweet potato vine prevents weeds, conserves moisture

Pollinator attractors: Marigolds and cosmos

Beneficial insect shelter: Ornamental grasses

Benefits: Self-fertilizing, self-mulching, pest-resistant mini-ecosystem

​

Creating Your Companion Planting Plan

Step 1: List Your Main Crops Choose 5-8 vegetables your family eats most

Step 2: Research Companions Use our chart above to identify good companions and plants to avoid

Step 3: Map Your Beds Sketch bed layouts showing plant placement:

Tall plants on north side (don’t shade shorter plants)

Companions grouped together

Pest-deterrent borders

Step 4: Plan Succession What follows what? Ensure good crop rotation while maintaining companion relationships

Step 5: Observe and Adjust Keep notes on what works in your specific conditions—every garden is unique

​

Visit BOTANICA Escario’s Living Classroom

Our garden demonstrates dozens of companion planting combinations you can see in action.

Walk our paths and observe:

The Three Sisters garden producing abundantly

Tomato beds thriving with their herbal companions

Beneficial insect gardens buzzing with pollinators

Guild plantings around fruit trees

 

​