One-Minute Summary
This is the summer zinnia succession planting method that gave me near 100% germination without direct seeding and without hardening off. I do not direct seed zinnias because birds can disturb the seeds, and I want more control over moisture. Instead, I start them in trays outdoors using the same Winstrip / NeverSink-style tray setup I talked about in my seed starting system article: My Seed Starting System
During summer, I skip the indoor shelf, grow lights, and fan. I place the trays outside next to the house by the hose, keep the mix evenly moist, and let the seedlings grow in real outdoor conditions from day one.
The result: strong germination, easy watering, no hardening off, and better control over my summer succession planting.This article also includes the tools and supplies that supported the system — what worked, what did not, and what I would actually use again.
A lot of flower farmers direct seed zinnias, and that makes sense for production rows.For my home garden, I prefer more control.
I do not direct seed because:
Starting zinnias in trays gives me the control of indoor seed starting, but during summer I do not need the full indoor setup.The outdoor conditions are already warm enough. The only real job is keeping the tray evenly moist.
For this method, I use the Winstrip / NeverSink-style tray setup from my seed starting system:
My Seed Starting System For this batch, I used the 72-size home version. This setup has 6 slots per tray section, which makes it easy to handle, water, and transplant. I like this tray system because it keeps the seedlings organized. It also gives me more control than direct seeding, without making the process complicated.
I use Old Potters Germination Mix. Before filling the trays, I mix the germination mix with water first. I do not like filling trays with dry mix and then trying to wet everything afterward.
Pre-moistening helps the mix hold together and gives the seed even moisture from the beginning.The mix should feel moist, but not soaking wet.
This is one reason I prefer a proper germination mix over experimenting with coarse ingredients. I bought medium vermiculite early on, thinking it would help with seed starting, but I learned that particle size matters.
Link: https://amzn.to/4un4RNt
Paid: about $69.72
My experience:
This was a rookie mistake. If you ask Google or AI, they may recommend peat moss plus vermiculite as a seed starting mix. What I learned is that for seed starting, the mix needs to be fine enough to hold moisture around the seed. If the particles are too coarse, small seeds can dry out too quickly.For seed starting, Old Potters Germination Mix worked better for me.
For growing as a soil conditioner, pine fines worked better. I buy Hapi-Gro Organic Soil Conditioner, 1.5 cu ft, from Lowe’s for about $5.
After the mix is moistened, I fill each tray. I gently fill each slot with the moist germination mix. I do not pack it hard, and I do not push it down with my fingers.
Instead, I bang the small tray against the table to compress the air pockets and settle the mix naturally.That gives the seed good contact with the moist mix without making the tray too compacted.
I plant each zinnia seed pointed side down. I do not add more germination mix on top afterward. I simply push the seed down into the moist mix until it is covered.
I like planting by hand because I can make sure each cell gets one seed. This matters especially when I am growing seed from my own zinnia selection lines and do not want to waste seed.
This is the part that made summer succession planting much easier. Instead of putting the trays indoors under grow lights with a fan, I place them outside next to the house by the hose.
During summer, the conditions are already warm enough for zinnias. I do not need to recreate summer indoors.The tray stays outside from the beginning, so the seedlings are exposed to outdoor light, air movement, and natural temperature changes right away.
That means I do not need to harden them off later.
I mist the top of the tray gently. Then I use the shower setting on the hose so I can bottom water the tray without blasting the seeds out of place.
This gave me near 100% germination. The seeds stayed moist, but they were not being washed around. Keeping the tray near the hose made it easy to check and water quickly.
This is also why I eventually moved away from complicated irrigation ideas for my home garden.
Sow zinnia seeds in trays. Place the trays outside near the house by the hose. Mist the top and bottom water as needed.
Watch for germination. Keep the tray evenly moist. Do not let the top dry out completely.
At the two-week mark, I use a 1/2-strength solution of fish fertilizer. This is the only time I fertilize the seedlings before transplanting.
At about three weeks from sowing, I transplant the seedlings into the garden. Because they have been outside since day one, I do not need a separate hardening-off process.
This method fits the way I actually garden. I am not running a large production flower farm. I am growing a home cut flower garden where I care about:
For summer zinnias, this tray method gives me control without making the process complicated. The bigger lesson from this first season is that every tool has to fit the garden. Some products may be useful on a flower farm, but not practical in a home garden.
Once I started succession planting more intentionally, I realized the tools around the system mattered too. Some purchases made the garden easier. Some made it more complicated. Some were useful, but not right for my scale.
Link: https://amzn.to/4ePTiJU
Paid: about $47.97
Order date: Sept. 14, 2025
I use these for:
These are one of my main harvesting tools. For cutting zinnias, dahlias, ranunculus, and other stems, these are much better than regular scissors.
This plus a floral knife gives me a complete cutting system.
TONMA Hori Hori Garden Knife, heavy-duty stainless steel Japanese hori knife with sheath, for weeding, digging, cutting, pruning, 7.25-inch blade, full tang.
Link: https://amzn.to/3QFrhuL
Paid: about $71.20
Order date: Nov. 1, 2025
I use this for:
This is one of the most useful tools I bought. It is especially helpful for perennials, dahlias, tubers, and transplanting.
Succession planting is not only about germination. Once plants are in the ground, they still need support. This is where I learned that production flower farm systems do not always translate well to a home garden.
Link: https://amzn.to/42BoV2z
Paid: about $82.17
I bought this for:
My experience:
I did not end up using this. For a home garden, trellis netting made access harder and made the garden look messy. I can see how it would work better in production rows, but for my setup, it was not practical or attractive.
I would discard or donate this.
50Pcs 3 ft bamboo sticks for indoor and outdoor plants, 0.29–0.38 inch natural bamboo poles, durable garden stakes for tomatoes, beans, flowers, and potted plants.
Link: https://amzn.to/4tRXnlB
Paid: about $42.68
I use these for:
My experience:
I used these for dahlias. For small quantities, bamboo stakes are better than netting. They are easier to move around, easier to weed around, and easier to cut around.
For a home gardener, bamboo stakes are more practical.
Joyhalo 12 Pack Tall Snake Plant Support Stakes for Indoor Plants, 24 Inch, Peony Cages and Supports, Peony Cage with 15 Pcs Twist Ties, Monstera Plant Support for Plants Tomato, Hydrangea, Monstera.
Link: https://amzn.to/4t7u8dp
Joyhalo 20 Pack Plant Support Stakes, 36 Inches, Plant Stakes, Flower Stakes with 24 Twist Ties, Garden Sticks for Plants Hibiscus, Sunflower, Red Hot Poker, Hydrangea, Tomato, Sapling, etc.
Link: https://amzn.to/4uoXzJ7
Paid: about $38.42
Status: Returned
My experience:
I tested these, but they were not sturdy enough. The round supports were hard to interlock and did not feel efficient.
Bamboo stakes were cheaper, sturdier, and more useful for my garden.
YDSL 100 Feet Soft Tie for Plants, 3 Pack Green Twist Garden Ties Gardening Supplies for Supporting Climbing Plants, Tomatoes, Vegetables, diameter 2.5 mm.
Link: https://amzn.to/4umZVIr
Paid: included in about $82 order
I bought these for:
My experience:
I originally bought this to secure the trellis netting I never used. The ties are still useful for different garden jobs, but I find garden twine more useful overall.
Vivifying Garden Twine, 656 Feet, 2 mm green plant ties, strong jute twine string for climbing plants, tomatoes, floristry, and crafts.
Link: https://amzn.to/4w1fmaO
Paid: included in about $48 order
I use this for:
This is a true dual-purpose tool: growing and floristry.
This summer zinnia system worked because the watering was simple. The trays were near the hose. I could mist the top and bottom water with the shower setting. That was enough.
Earlier in the season, I tried to build more complicated watering systems, but most of them made the garden harder instead of easier.
8 in. DEEP DRIP Garden Watering Stake, tan, UV-protected ABS plastic deep root irrigation spike for flowers, fruits, vegetables, and potted plants.
Link: https://amzn.to/4taI86f
Paid: about $120.10
My experience:
I bought this to use with drip tape. I have to agree with Micro Flower Farm that drip tape can become a problem right from the start. I currently use a garden hose or regular watering can, and I find that much easier.
Unlike other products that I returned quickly, I really wanted to give these a chance. That was my mistake because the return window passed.
I even listed mine on eBay. Amazon sells them for around $5 each, and I listed mine as a lot for about $2 each. Not one bid.
I eventually donated them to Goodwill.
6 Set Garden Hose Adapter Brass Standard 3/4 Inch Female Thread to 1/4 Inch Tube Adapter, converts 3/4 inch garden hose to 1/4 inch tube for water pipe coupling supplies.
Link: https://amzn.to/4eBW2e7
Paid: included in about $42 order
Status: Returned
My experience:
I bought these for an irrigation setup, but the hose still leaked. I returned them.
Link: https://www.sustainablevillage.com/
Paid: $120.04 total
Order included:
My experience:
This was much simpler and more reliable than trying to build a complicated irrigation setup. For my garden, simple watering systems win.
The Blumat bottle adapters are useful for individual high-value plants like peonies, but I would not use them everywhere.
For summer zinnia succession trays, the hose method is still the easiest: mist the top, bottom water with the shower setting, and keep the trays close to the house.
The same lesson showed up with soil and fertilizer. I tried several products during my first season because I wanted to build the garden correctly. But going forward, I think my system will be much simpler.
MySoil Soil Test Kit 2 Pack, complete nutrient and pH analysis with recommendations tailored to your soil and plant needs.
Link: https://amzn.to/49hULVI
Paid: about $62.97
I bought this for:
My experience:
This is a useful growing decision tool, but next time I will likely use the North Carolina Department of Agriculture soil testing instead.
NCDA soil testing link: https://www.ncagr.gov/divisions/agronomic-services/soil-testing/homeowners/tests-and-fees
At the time I checked, NCDA homeowner soil testing was $0 in non-peak season and $5 during peak season.
For North Carolina gardeners, the extension or agriculture soil test is a better value.
After listening to the Dirt on Flowers podcast, I ordered Vitalize products because the company came highly recommended.
Order summary:
Subtotal: $319.99
Shipping: $0.00
Taxes: $0.00
Total: $319.99 USD
My experience:
I agree that soil health is important. But going forward, I think I will keep things simpler. For my home garden, I will likely use compost and a basic organic flower fertilizer instead of building a complicated fertility system.
Down To Earth All Natural Fertilizers Organic Flower Garden, plant food for blooming annuals, perennials, and flowering shrubs, 2-6-5, 1 lb.
Link: https://amzn.to/3OOiru8
Link: Timberline Cow Manure & Compost Soil
I can usually find this for around $3 at Walmart. For my scale, compost plus a simple organic flower fertilizer may be the better long-term system.
Approximate known purchases:
Estimated total: about $600–$800+ before adding every small item, and over $900 if including the full Vitalize order. This is why tracking purchases matters. Some products were useful. Some were not. Some were good products, but not right for my garden.
If I simplified this down to the items I would actually keep using, it would be:
This is the practical system that fits my home garden.
I do not direct seed because I want control, but I also do not need grow lights, fans, and indoor shelves for summer zinnias. Starting trays outdoors near the hose gave me near 100% germination, no hardening off, and an easier transplanting process.
The tray setup gave me control over moisture, spacing, and germination. Pre-moistening the mix, settling the tray by tapping it against the table, and pushing the seed into the mix pointed side down made the process simple and repeatable.
Trellis netting may work for a production flower farm, but for a home garden, it made access harder and reduced the beauty of the garden. Bamboo stakes were better for my scale.
Complicated irrigation systems were frustrating and leaky. For most of my garden, a hose or watering can is easier. For special plants, Blumat bottle adapters are useful.
A flower farm may prioritize efficiency and production rows.
A home gardener also cares about:
The best system is the one you will actually maintain. For my garden, that means simple trays, simple watering, useful hand tools, bamboo stakes, compost, and fewer complicated systems.
