Show #138: Late April Gardening: Roses, Azaleas, and the Truth About Fertilizer

Late April marks the moment when spring fully opens up. Frost risk is nearly gone, garden centers are overflowing with color, and planting season hits full stride. This episode focuses on what to plant now, the latest plant hybrids, and a critical breakdown of fertilizer quality and value.

Spring Is Fully Open: What You Can Plant Now

By April 26, the gardening season is wide open.

You can now:

• plant annuals and perennials
• install tropical plants
• refresh containers and beds
• enjoy peak azalea bloom

Hold off just a bit longer on:

• tomatoes (wait one more week)

This short delay helps avoid late cold stress and ensures better long-term growth.

Top Plant Highlights Right Now

Spring inventory is at its peak, with standout performers across multiple plant categories.

Best Rose in Bloom

The Bolero Rose stands out as a top performer.

Key features:

• pure white blooms
• up to 100 petals per flower
• exceptional fragrance

It is highlighted as one of the most fragrant and visually striking roses available.

Azaleas Have Evolved

Traditional favorites like Hino Crimson and Coral Bells still shine, but modern azaleas have taken performance to another level.

Newer varieties include:

• Encore Azaleas (repeat bloomers)
• Bloom-a-thon Azaleas (heavier rebloom cycles)

Top performer:

• Bloom-a-thon Pink — large, double blooms with extended flowering

Also notable:

• Pink Cupcake — compact, long-blooming dwarf variety

Hydrangeas and Shrubs That Bloom All Season

Modern hydrangeas now deliver extended color well beyond traditional bloom windows.

Standout varieties include:

• Endless Summer hydrangea
• Summer Crush (compact raspberry color)

Other improved shrubs:

• Pugster Amethyst / Pugster Blue Butterfly Bush — compact plants with massive blooms
• Black and Bloom Salvia — tall, hardy, and highly attractive to hummingbirds

These newer hybrids offer:

• longer bloom cycles
• more compact growth
• stronger pollinator attraction

Tropical Plants for Instant Summer Color

Tropical plants are now widely available and ready to plant.

Top options:

• mandevilla
• hibiscus
• dipladenia

These provide bold, continuous color and perform exceptionally well in containers and sunny beds.

The Truth About Fertilizer: Why Quality Matters

One of the most important topics in this episode is fertilizer quality.

The key principle:

high-performance plants require high-performance nutrition

Problems with Low-Quality Fertilizers

Older or low-grade products often lack:

• slow-release nitrogen
• trace elements
• sulphate of potash
• long-term feeding ability

They may also:

• contain high salt levels
• increase watering demands
• deliver poor long-term value

What to Look For Instead

High-quality fertilizers should include:

• slow-release nitrogen
• full trace element package
• balanced nutrient delivery over time

Recommended options:

• Plant Trust
• Fertilome Start-n-Grow
• Anderson’s 18-6-12

Key takeaway:

price per pound of nitrogen matters more than bag price

Liquid fertilizers are also heavily diluted, making them far less efficient for long-term feeding.

Container Planting Tips for Success

For patio pots and container gardens:

• use slow-release granular fertilizer
• mulch over the top of soil
• maintain consistent moisture

This improves:

• water retention
• nutrient availability
• overall plant performance

Finding Value in Garden Products

This episode emphasizes that price and quality are not always aligned.

Better value comes from:

• higher active ingredient levels
• better plant genetics
• longer-lasting performance

Examples of smart buying:

• premium tools at lower cost
• higher-quality fertilizers at lower cost per nutrient
• better plant varieties with improved performance

Japanese Maples and Specialty Trees

Spring is also a great time to shop for specimen trees.

Popular Japanese maple varieties include:

• Red Dragon (laceleaf red foliage)
• Trombley’s Red Sentinel (compact upright form)
• Hana Matoi (unique red and pink foliage mix)

These trees provide structure, texture, and seasonal color in landscape design.

Final Takeaway: Performance Over Marketing

The biggest message from this episode is simple:

buy for performance, not branding

Whether it’s:

• fertilizers
• plants
• tools

Better inputs lead directly to better garden results.