10 Best Seed Starting Trays for Patios in 2026: Smart Picks for Small-Space Growing

Starting seeds on a patio is easier when your trays fit the available space, provide reliable drainage, and protect young plants from changing outdoor conditions. The right setup can help you organize many seedlings without turning a small growing area into a cluttered workspace.

We’ve rounded up 10 seed-starting options with different cell counts, tray sizes, materials, and included features. Use the guide below to match your plants, patio, and growing routine with a practical tray system.

Best 10 Seed Starting Trays for Patios Picks for 2026

Best Value Bulk Trays – Mr. Pen 5-Pack Seed Starter Trays

For gardeners who want simple, reusable seed starting trays for patios, this five-pack offers plenty of workspace for seedlings, sprouts, microgreens, or general potting tasks. The lightweight 17-by-10-inch trays have raised edges to help contain soil, fertilizer, and water.

Best For: Beginners and gardeners who need several open trays for indoor or outdoor growing projects.

Pros:

• Includes five reusable trays for starting multiple plants.
• Raised edges help keep soil and water contained.
• Lightweight, easy to clean, and compatible with heat mats, humidity domes, and hydroponic systems.

Cons:

• These are open trays without included cells, domes, tools, or labels.
• The supplied details do not specify built-in drainage holes.

This is a practical, low-complexity option when you already have your preferred inserts or want flexible trays for potting and seed work. Its five-tray format also helps reduce the need for disposable containers.

Best for Easy Transplanting – Burpee SuperSeed 36-Cell Tray

The Burpee SuperSeed is a strong choice among seed starting trays for patios when organized, low-stress transplanting matters. Its 36 flexible silicone cells, labeled rows, and watering features help simplify the process from germination through moving seedlings outdoors.

Best For: Gardeners starting herbs, flowers, vegetables, peppers, or tomatoes who want clearly organized seedlings and easier transplanting.

Pros:

• Flexible food-grade silicone cells pop out to help reduce root disturbance.
• Molded drainage slots and deep watering channels support drainage and aeration.
• Includes alphanumeric row labels and a Plant-o-Gram diagram.
• Reusable and top-shelf dishwasher safe for easier cleanup.

Cons:

• It is a single 36-cell tray rather than a multi-tray pack.
• The supplied product information describes it primarily for indoor use.

This tray is especially useful if transplanting delicate seedlings is your main concern. The integrated organization and watering design make it more structured than a basic open planting tray.

Best Complete Starter Kit – VIVOSUN 6-Pack 72-Cell Kit

For a more controlled setup, the VIVOSUN kit combines six 12-cell trays with base trays and humidity domes, making it a versatile option for seed starting trays for patios. Adjustable vents help manage moisture and temperature, while drain holes help protect roots from overwatering.

Best For: Gardeners who want multiple covered trays for managing batches of seedlings and moving them into beds, containers, or raised gardens.

Pros:

• Includes six trays, six bases, six adjustable-vent humidity domes, tools, and labels.
• Drain holes help reduce overwatering and support healthier roots.
• Compatible with heat mats operating from 0 to 120°F.
• Reusable trays can accommodate different types of seeds and growing approaches.

Cons:

• The individual trays are relatively compact at 7.48 by 5.91 inches.
• The supplied details identify indoor use, so patio placement may require suitable protection.

This is the most equipped option in the group for gardeners who want humidity control and accessories included. Its six-tray format suits larger planting sessions without requiring separate dome purchases.

Best for Small-Space Batches – Mr. Pen 10-Set 120-Cell Kit

Gardeners with limited patio space may appreciate these compact seed starting trays for patios. The ten 12-cell kits provide 120 total cells, while transparent domes, adjustable vents, drainage holes, and included planting tools create a convenient setup for repeated seed-starting sessions.

Best For: Small-space gardeners who want many individual cells in compact, covered trays.

Pros:

• Ten 12-cell trays provide 120 total planting cells.
• Transparent domes with adjustable vents help retain moisture and provide ventilation.
• Drain holes help prevent overwatering and root rot.
• Includes a shovel and scoop for planting and transplanting.

Cons:

• The individual trays are smaller than full-size open trays.
• The supplied details do not mention heat-mat compatibility.
• The product is specified for indoor use, so patio use may need appropriate conditions.

This kit favors quantity and compact organization over large growing areas. It makes sense for starting many small batches at once, especially when covered humidity control and basic tools are useful.

Bulk Tray Value – 10-Pack No-Hole Growing Trays

For gardeners comparing seed starting trays for patios, this 10-pack offers roomy, reusable bases for seedlings, microgreens, wheatgrass, or hydroponic setups. The no-drain design is especially useful when you want to contain water or use the trays as drip trays.

Best For: Patio gardeners needing multiple large, no-hole trays for seed starting, microgreens, or hydroponic growing.

Pros:

• Includes 10 reusable plastic trays.
• No drain holes help prevent leakage and work well as drip trays.
• Accommodates 20-by-10-inch grow pads and micro-mats.
• Suitable for seedlings, wheatgrass, microgreens, and hydroponic growing.

Cons:

• No drain holes require careful watering to avoid excess moisture.
• The large footprint may be more than needed for small patio spaces.
• Designed for indoor use according to the listed specifications.

Choose this set when quantity and flexible, leak-containing use matter most. Its generous rectangular format is practical for organized batches, provided you manage watering manually.

Best for Everyday Use – Reusable 6-Cell Starter Trays

These six-cell trays are a practical choice for seed starting trays for patios when you want individual seedlings organized in compact modules. Recycled UV-resistant plastic, air-pruning slots, and finger holes are designed to support root development and simplify transplanting.

Best For: Gardeners who want reusable cell trays with easy seedling removal and organized transplanting.

Pros:

• Six-pack construction provides multiple reusable trays.
• UV-resistant recycled plastic is designed for long-term use.
• Air-pruning slots and open bases encourage healthy root development.
• Finger holes make seedlings easier to push out for transplanting.

Cons:

• Each tray has only six cells, so larger sowings require multiple trays.
• The listed indoor-use specification may not suit every outdoor setup.
• Cells are relatively compact at about 1 9/16 inches wide and 2 1/4 inches high.

This is the most transplant-focused option of the three. Its modular design can reduce handling stress, making it a strong fit for gardeners prioritizing root health and easy seedling removal.

Patio Microgreen Organizer – 10-Pack No-Hole Trays

For seed starting trays for patios, the Sckee 10-pack combines a no-hole design with a space-conscious format for seedlings and microgreens. The stackable trays can help organize larger quantities of starts while making storage easier between growing cycles.

Best For: Patio and indoor growers starting batches of microgreens, seedlings, or fodder in reusable trays.

Pros:

• Includes 10 sturdy, reusable plastic trays.
• No-hole construction is designed to prevent leakage.
• Works with seeds, heat mats, domes, nursery pots, peat products, and soil.
• Stackable design saves storage space.

Cons:

• No drainage means watering requires close attention.
• The trays are listed for indoor and outdoor use but do not include drainage holes.
• At roughly 16.9 by 10 by 2.5 inches, they may still occupy notable patio space.

This set balances batch capacity and storage convenience. It is a sensible choice for beginners or experienced growers who want uniform, contained starts and are comfortable managing moisture without built-in drainage.

Best High-Volume Pick – 144-Cell Seed Starting Trays

For gardeners comparing seed starting trays for patios, this 144-cell set offers a practical way to start many flowers, herbs, succulents, or vegetables in a compact format. The individual cells are 1.5 inches square and 2.25 inches deep, with drainage slits to help manage excess water.

Best For: Patio gardeners starting a large variety or quantity of seedlings.

Pros:

• Includes 24 trays with 144 total cells.
• Deep cells support developing root systems.
• Drainage slits help prevent overwatering.
• Includes five plant stakes for labeling and organization.

Cons:

• The large 144-cell quantity may be more than needed for small planting projects.
• No humidity dome or lid is listed.

This is a straightforward, space-conscious option when volume and variety matter most. Its reusable construction and included stakes add practical value for organized patio seed starting.

Best Transplant-Friendly Kit – 48-Cell Silicone Seed Starter Tray

Among seed starting trays for patios, this 48-cell kit stands out for its flexible silicone bottoms and included 4.33-inch humidity dome. The pop-out design is intended to release seedlings and roots intact, while the drainage grooves help move excess water away from the cells.

Best For: Patio growers who want easier transplanting and a covered germination setup.

Pros:

• Flexible silicone bottoms are designed to release seedlings intact.
• Includes a tall humidity dome and lid for covered germination.
• Drainage grooves support aeration and excess-water removal.
• Comes with 10 labels and two planting tools.

Cons:

• With 48 cells, it offers less starting capacity than the 144-cell set.
• The silicone-and-plastic design may require more cleaning than simple trays.

This kit is a strong choice when transplanting convenience is a priority. The flexible bottoms, dome, labels, and tools make it a more complete setup for patio seed starting.

Best Simple Reusable Set – Gardzen 30-Pack Seed Trays

For a simple approach to seed starting trays for patios, the Gardzen 30-pack provides six-cell trays with drainage holes and guide channels at the top to help distribute water. Each cell measures 1.5 inches square by 2.2 inches deep, accommodating flowers, vegetables, and herbs.

Best For: Gardeners who want a straightforward, reusable tray set for regular seed-starting batches.

Pros:

• Includes 30 six-cell trays for flexible batch planting.
• Drainage holes help reduce excess moisture.
• Cell depth supports root development.
• Trays can be cleaned and reused.

Cons:

• No humidity dome, labels, or tools are listed.
• The six-cell format provides less capacity per tray than larger inserts.

This set keeps the process uncomplicated and offers useful flexibility for successive planting rounds. It is a practical fit for patio gardeners who value reusable trays and basic drainage over extra accessories.

How We Picked the Best Seed Starting Trays for Patios

We compared these trays by the features that matter most in a compact outdoor growing setup: footprint, cell capacity, drainage, humidity control, durability, portability, and ease of transplanting. We also considered whether each option suits a few container plants, a larger seed-starting project, microgreens, or repeated seasonal use.

Because patio conditions vary, no single tray is ideal for every gardener. A covered kit may be useful in cool or windy weather, while open trays can be simpler to monitor in warm, sheltered spaces.

Quick Comparison

Best for	Look for
A few herbs or flowers	Small six-cell or 10-cell trays
Many seedlings	High-capacity 36-, 48-, 72-, or 144-cell systems
Windy or cool patios	Humidity dome or covered starter kit
Frequent reuse	Thicker, washable plastic or flexible silicone
Microgreens and shallow crops	Wide growing trays with suitable depth

Key Buying Factors for Seed Starting Trays for Patios

Size and Cell Count

Measure your shelf, bench, or railing-mounted growing area before buying. Larger trays maximize output but can become heavy and difficult to move after watering. Smaller multi-packs let you stagger plantings and rearrange seedlings as sunlight changes.

Drainage and Water Management

Drainage holes help prevent saturated roots, especially after rain or frequent watering. If a tray has no drainage holes, use it as a catch tray or verify that it is intended for a controlled indoor or covered setup. A separate water-resistant base can protect patio surfaces.

Depth, Covers, and Airflow

Deeper cells give roots more room before transplanting, while humidity domes can support germination in dry or cool conditions. Once seedlings emerge, provide ventilation and remove or adjust the cover as needed to reduce excess moisture and weak growth.

Durability and Transplanting

Reusable trays are worthwhile if you start seeds every year, but thin plastic may flex or crack when moved. Flexible cells can make removal easier, while rigid trays are often simpler to carry and stack. Clean trays between crops to reduce the spread of plant problems.

Who Should Buy Which Seed Starting Trays for Patios?

Choose compact six-cell or small multi-cell trays if you have limited patio space or only need a few plants at a time. High-capacity 36- to 72-cell kits are better for gardeners growing several varieties, vegetables, or flowers together. For the biggest batches, 120- or 144-cell assortments offer flexibility but require careful labeling and watering.

Buy a humidity-dome kit if your patio is exposed to cool air, wind, or rapid moisture loss. Pick open trays when you want faster access for watering and hardening off. Gardeners focused on repeated seasonal use should prioritize sturdy, washable construction, while occasional growers may prefer an inexpensive multipack that provides enough cells for one planting cycle.