When To Plant Zinnia Seeds And How To Develop Zinnias From Seed

Zinnias are some unbelievable flowers that convey a late-season burst of colour to your backyard from midsummer nicely into fall.

These pretty crops could be divided to create extra Zinnia flowers, however there’s simply one thing satisfying about rising a plant from scratch.

Planting Zinnia SeedsPin

This useful little information will show you how to develop zinnias from seed and present you easy methods to harvest the seeds if you happen to don’t need to exit and purchase packets.

When To Plant Zinnia Seeds

The precise time to plant can fluctuate lots relying on the place you might be and the way you’re germinating them.

Nonetheless, the bottom line is that they’re extremely chilly illiberal and can’t be planted open air till all danger of frost has handed.

Harvesting Zinnia Seeds

Let’s begin with the choice lots of people by no means consider – harvesting seeds out of your current zinnias.

Please word that utilizing seeds from most cultivars will possible lead to one of many father or mother crops, and a few cultivars are sterile, so that you’ll have to divide these specimens except you don’t thoughts a shock.

A number of exceptions to this rule are cultivars referred to as “open-pollinated,” and if in case you have one of many following examples, you’ll be capable to get the identical plant out of the seeds:

  • ‘Cactus Shiny Jewels’
  • ‘California Large’
  • ‘Canary Hen’
  • ‘Sweet Cane’
  • ‘Minimize ‘n’ Come Once more’
  • ‘Inexperienced Envy’
  • ‘Jazzy Combine’
  • ‘Lilliput’
  • ‘Pink Spider’
  • ‘State Honest Combine’

As soon as you recognize you have got a zinnia that matches these guidelines (or need that shock plant), you have got one other little hurdle to beat: cross-pollination.

Once you see buds forming on zinnia crops, you need to maintain them pure and put little baggies over the buds, leaving them unfastened sufficient to allow blooming.

It will forestall pollinators from accessing the flowers till you’re prepared, that means you possibly can expose solely particular species at a given time so you recognize you received’t find yourself with a hybrid.

As soon as your required flowers are pollinated, you’ll have to withstand the urge to deadhead and permit the heads to dry out.

This permits the seeds to mature correctly, and it’s solely protected to reap the flower heads as soon as they flip darkish brown and are dry to the contact.

It’s possible you’ll want to discard the heads of any zinnia affected by powdery mildew, as this fungus can infect the seeds.

Take away the ripe seed heads and place them on screens for a couple of week to make sure they’re completely dried out on all sides.

Be sure to all the time maintain the seeds and seed heads from totally different crops separate and labeled so you recognize which seeds are for which crops.

Lastly, place a seed head on a paper towel and gently hit it a number of occasions to dislodge the seeds.

It’s also possible to attempt ripping the seed head aside and manually eradicating the seeds.

Remember to take away any remaining petals from the seeds and some other particles.

Storing Recent Zinnia Seeds

Unfold your seeds and permit them to air dry for a couple of extra days to cut back the danger of mould or rot setting in whereas they’re being saved.

Stick them in an envelope or paper lunch bag and mark the plant’s identify on the surface and the date.

Zinnia seeds have shelf viability of three to five years, so having a date will show you how to prioritize your future plantings.

Retailer this bag or envelope in a sealed glass jar in a cool, dry spot away from vibrant mild till wanted.

Planting Seeds Indoors

Germinating seeds indoors can’t solely be numerous enjoyable, however it additionally provides your crops a head begin.

You should utilize ceramic or terra cotta pots, however a greater choice is to germinate the seeds in peat pots, as these could be planted straight into the bottom later with out stressing the plant an excessive amount of.

Seed trays aren’t a great choice for this plant, because the roots are fragile and simply damaged when dealt with.

Purpose to plant the seeds roughly 6 weeks earlier than the ultimate frost is due.

Keep in mind the spacing your zinnias will want, which may fluctuate from one species to a different, as this may forestall you from rising too many to slot in the backyard.

Utilizing a starter potting combine in your soil, gently press every seed 1/4″ inch deep.

Zinnias want a soil temperature of 60° to 70° levels Fahrenheit to germinate correctly, so keep away from a spot with a danger of chills or drafts.

Hold the soil frivolously and evenly moist and supply vibrant, oblique solar till the seeds germinate.

You need to see them poking out of the bottom in a couple of month.

If the ultimate frost has handed, you possibly can transplant the seedlings to your backyard or transfer pots to a sunnier location.

Planting Seeds Instantly Into The Backyard

Planting in a backyard isn’t a lot totally different from beginning indoors, though there are some necessary variations.

First, you’ll want to attend till the hazard of frost has fully handed.

The soil must be a minimum of 60° levels Fahrenheit to make sure correct progress.

You’ll additionally have to loosen the soil a number of inches all the way down to make it simpler for the fragile roots to develop.

The best circumstances are a spot with well-drained soil, amended with natural matter, and uncovered to full solar.

As soon as the seeds germinate, you possibly can skinny them out so solely the strongest stay, however keep in mind that the roots are fragile, so it’s higher to take away the weaker ones and go away the robust crops undisturbed when attainable.


This step is extremely easy if you happen to begin the zinnias indoors in peat pots.

Simply dig holes at correct intervals, slide your peat pots in, and backfill.

It’s a extra delicate operation eradicating them from a sturdier container, nevertheless.

Attempt to slide the plant out, soil and all, and plant this within the gap.

If the soil breaks aside, attempt to not disturb the roots and plant as gently as attainable, so there’s minimal danger of damaging them.