Top 10 Questions About Seed Care


Starting
plants from seed is an integral part of gardening. Here at Gardening Know How we get lots of
questions about starting
seeds
, and our goal is to provide answers to those inquiries to the best of
our knowledge. The following information includes the 10 most commonly asked
questions about germinating
seeds and caring for seedlings
.

1. Where/how to store seeds for flowers and vegetables?

Seeds retain their viability when stored at cool
temperatures, lower humidity and reduced light exposure. Begin by harvesting
high-quality seeds from healthy produce. Next, be sure to thoroughly dry the
seeds, then seal
them in an airtight container
. A jar or zippered plastic bag works well.
Next, place the sealed container in the refrigerator or freeze
them
for storage. Be sure to label the seeds to avoid mix-ups in the
spring. It’s advisable to use seeds as soon as possible for the quickest
germination rate.

2. How long do seeds stay fresh?

How long seeds stay fresh depends upon the type of seed and
how the seeds were stored. Seeds stored in a cool, dry, dark location will
remain fresher for a longer period of time. On average, most types of vegetable
seeds will be viable for 2 to 3 years. Lettuce seed is particularly long-lived
and can last for up to 5 years. On the other hand, parsnips rarely germinate
after 1 year. To determine freshness, conduct a germination
test on the seeds
by placing 10 seeds on a moist paper towel. Seal the
paper towel in a plastic bag or container. Wait ten days and count the number
of seeds which sprouted.

3. Why are some of my seedlings tall and flopping over?

Legginess
in seedlings
is a symptom of inadequate exposure to light. This condition
causes seedlings to grow tall and narrow stems which can’t support the weight
of the leaves. Most vegetable plants require 6 to 8 hours of direct sunlight
per day. When sowing outdoors, plant vegetable seeds in a sunny location.
Artificial lighting is often necessary when starting seedlings indoors.
Florescent tubes were a popular choice in the past, but have since been phased out.
These are being replaced with LED bulbs. Most indoor seedlings require 16 hours
of artificial light per day to prevent legginess.

4. Can you still plant frozen seeds?

Yes! In northern climates, seeds from
native plants frequently lay in frozen ground before germinating as soil
temperatures rise in the spring. In fact, seeds of some species require a cold
period, or stratification, before germination can proceed. Additionally, seed banks
freeze their seeds in order to preserve and extend their freshness. To freeze
seeds, be sure they are thoroughly dry as moisture can cause the seed to crack
as it freezes. Place the seeds in an airtight container and avoid exposing
frozen seeds to bursts of warm, humid air. Keep the frozen
seeds
at a constant temperature until they are thawed for
planting.

5. What seeds should be soaked and why?

Soaking
seeds
is a gardening trick to speed up germination rates. Larger seeds,
those with a tough seed coat or ones which are traditionally slow to germinate,
will benefit the most from soaking. Soaking seed is also useful whenever faster
germination is desirable. To soak seeds, place them in a bowl of warm water.
Large seeds, such as peas and beans, require an overnight soak of 8 to 10
hours. Smaller or thin-walled seeds can benefit from soaking for as little as 1
to 2 hours.

6. Do all seeds need to be covered in order to germinate?

Covering seedlings
is not necessary but it helps retain moisture levels which is essential for
completion of the germination process. If seeds dry out at critical times, they
may fail to sprout. If a cover is not used, it’s advisable to regularly check
the seeds and mist with water to maintain a moist medium. Some seeds also
require light to germinate, so any cover should be 100% transparent. Many seed
starting trays come with clear covers, but these often get lost or damaged over
the years. Plastic wrap can be used a substitute to cover seed cells. To
prevent fungal disease and rotting, be sure to remove any covering once the
seeds have sprouted.

7. What does it mean when it says to “sow thinly”?

Instructions to “sow thinly” often accompanies packets containing very small seeds. The challenge
with sowing small seeds is getting them spaced far enough apart to prevent
overcrowding once the seeds germinate. Trying to thin overcrowded seedlings can
result in root damage and lost plants. To thinly sow seeds, space small seeds
3/16 to ½ inch (5 to 10 mm.) apart. Using a seed syringe or mixing the seeds
with fine sand can make this task easier.

8. What are the brown discs used for growing seeds?

Seed-starting discs
are used for germinating seeds, growing seedlings and in hydroponic gardening.
Coir discs are manufactured using the husk or shell of coconuts and are
considered eco-friendlier than those made with peat. To use seed-starting
discs, soak them in warm water until they are fully expanded. The top of the
disc contains an indent or small hole in the material covering the discs. Use
this hole to insert the seeds. Keep the discs moist and warm while the seeds
germinate. Once seedlings have 2 to 3 sets of true leaves, the disc and
seedling can be planted into a pot, transplanted directly into the garden or
placed into the growing chamber of a hydroponic system.

9. What is the best type of clay for making seed balls?

Credited as being a “whole habitat in a tiny clay ball,”
seed balls are an easy way to distribute seeds in hard-to-sow areas. They
contain seeds, humus and clay. Making
seed balls
is fairly easy (and a fun project with kids): Mix the clay and
humus with enough water to give the consistency of modeling clay. Knead in the
seeds and roll the mixture into 1-inch (2.5 cm.) balls. For the best results,
use pottery clay. Look for it at your local craft or art supply store.

10. How many seeds do you put in each hole or pot?

The generic answer is 2 to 3 seeds per hole. This ensures
each pot will sprout a seedling. Once the seedlings have developed true leaves,
choose the strongest plant in each pot and cull any “extra” seedlings by
cutting them off at ground level. This eliminates competition and gives the
stronger plants room to grow. However, different species have different seed
germination rates. When planting large numbers of the same seed, conduct a
germination test and adjust the number of seeds per hole to better reflect the
germination rate.

We all have questions now and then, whether long-time gardeners or those just starting out. So if you have a gardening question, get a gardening answer. We’re always here to help.

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